September 29, 2025 · Applied Cybernetics Group
CVE-2025-20352 — Cisco IOS and IOS XE
Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability
- Added to KEV
2025-09-29- Federal due date
2025-10-20- Vendor
- Cisco
- Product
- IOS and IOS XE
- EPSS
- 88.6th percentile (score 0.040, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-20352
CISA short 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
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.