Cisco IOS and IOS XE
YES - ON THE CISA KEV LIST
CVE-2025-20352
Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability
overdue since 2025-10-20
Cisco: 103 entries (5.8% of all KEV entries are from this vendor); 21 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Cisco IOS and IOS XE contains a stack-based buffer overflow vulnerability in the Simple Network Management Protocol (SNMP) subsystem that could allow for denial of service or remote code execution. A successful exploit could allow a low-privileged attacker to cause the affected system to reload, resulting in a DoS condition, or allow a high-privileged attacker to execute arbitrary code as the root user and obtain full control of the affected system.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-x4LPhte ; https://nvd.nist.gov/vuln/detail/CVE-2025-20352
References
Other KEV entries for this vendor: Cisco
- CVE-2026-20320 - BroadWorks (2026-11-10)
- CVE-2026-76418 - Secure Firewall ASA Software and Cisco Secure FTD Software (2026-10-29)
- CVE-2026-76519 - Secure Email Gateway (2026-10-14)
- CVE-2026-76504 - Catalyst SD-WAN Manager (2026-09-30)
- CVE-2026-76460 - Identity Services Engine (2026-09-16)
- CVE-2026-76461 - Secure Email Gateway (2026-09-14)
- CVE-2026-20079 - Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management (2026-09-09)
- CVE-2026-20349 - Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) (2026-08-11)
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