Cisco known exploited vulnerabilities
Every Cisco CVE on CISA's Known Exploited Vulnerabilities catalog, newest addition first: 102 in all, 21 added in the last 12 months.
- CVE-2018-0179Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attackCisco IOS
- CVE-2018-0175Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOCisco IOS, IOS XE, and IOS XR
- CVE-2018-0174A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticCisco IOS and IOS XE
- CVE-2018-0173A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP VersioCisco IOS and IOS XE
- CVE-2018-0172A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticCisco IOS and IOS XE
- CVE-2018-0167Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software,Cisco IOS, IOS XE, and IOS XR
- CVE-2018-0161A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco CatalystCisco IOS
- CVE-2018-0159A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE SoftwaCisco IOS and IOS XE
- CVE-2018-0158A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unautheCisco IOS and IOS XE
- CVE-2018-0156A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attackerCisco IOS and IOS XE
- CVE-2018-0155A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco CataCisco IOS and IOS XE
- CVE-2018-0154A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN (ISM-VPN) running Cisco IOS Software could allow an unaCisco IOS
- CVE-2018-0151A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, reCisco IOS and IOS XE
- CVE-2017-6744The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow Cisco IOS · IntelliShield Universal Product
- CVE-2017-6743The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow Cisco IOS · IntelliShield Universal Product
- CVE-2017-6740The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow Cisco IOS · IntelliShield Universal Product
- CVE-2017-6739A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to rIntelliShield Universal Product
- CVE-2017-6738The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow Cisco IOS
- CVE-2017-6737A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to rCisco IOS
- CVE-2017-6736The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow Cisco IOS · IntelliShield Universal Product
- CVE-2017-6663A vulnerability in the Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacentCisco IOS and IOS XE
- CVE-2017-6627A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, reCisco IOS and Cisco IOS XE
- CVE-2017-12319A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow aCisco IOS XE
- CVE-2017-12240The DHCP relay subsystem of Cisco IOS 12.2 through 15.6 and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticatCisco IOS and IOS XE
- CVE-2017-12238A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could Cisco IOS
- CVE-2017-12237A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 couldCisco IOS and IOS XE
- CVE-2017-12235A vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS 12.2 through 15.6 could alCisco IOS
- CVE-2017-12234Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow anCisco IOS
- CVE-2017-12233Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow anCisco IOS
- CVE-2017-12232A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.Cisco IOS
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Frequently asked questions
How many Cisco vulnerabilities are in CISA KEV?
102 Cisco vulnerabilities are on CISA's Known Exploited Vulnerabilities catalog, 21 of them added in the last 12 months. The newest is CVE-2026-76418 (Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability), added 2026-10-29.
Which Cisco products are in CISA KEV?
44 products, including Secure Firewall ASA Software and Cisco Secure FTD Software, Secure Email Gateway, Catalyst SD-WAN Manager. Attackers have exploited every one of these entries in the wild, and US federal agencies must patch each by its CISA due date.
Are Cisco KEV vulnerabilities used by ransomware?
CISA knows ransomware campaigns exploit 7 of the 102 Cisco entries.