CVE-2025-20352 — Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability
CVE-2025-20352: Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Cisco |
| Product | IOS and IOS XE |
| Date added | 2025-09-29 |
| Due date | 2025-10-20 |
| Ransomware campaign use | Unknown |
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
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20352
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog