Exploited vulnerability

CVE-2025-20352

TLP:CLEAR

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

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.

Facts

Vendor: Cisco
Product: IOS and IOS XE
CVSS: 7.7
EPSS (probability of exploitation within 30 days): 41.5 %
On CISA's Known Exploited Vulnerabilities list since: 29 September 2025
First known exploitation: 29 September 2025
CISA's deadline for US federal agencies: 20 October 2025
Weakness: CWE-121
First seen by Risk Letters: 29 September 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD