Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability

Exploited in the wild. Listed by CISA on 2025-09-29; known to be used by ransomware.

40.6%likelihood of exploitation, next 30 days

99%of all CVEs are less likely

Nonecheck to confirm it

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.

No ready check is stored for this CVE. Confirm it by hand from the references.

References

https://nvd.nist.gov/vuln/detail/CVE-2025-20352

Use this check only on systems you are authorised to test. Where the data comes from