Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L L N C N N H 7.7 .3945 98.6 YES
AFFECTED Product Versions Fixed IOS 12.2(55)SE – — Cisco IOS XE Software 3.5.0E – — Cisco IOS XE Catalyst SD-WAN 16.9.1 – —
TIMELINE Oct 10 Reserved by cisco Sep 24 Published (CNA: cisco) Sep 29 Added to CISA KEV, remediation due 2025-10-20
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the following: An authenticated, remote attacker with low privileges could cause a denial of service (DoS) condition on an affected device that is running Cisco IOS Software or Cisco IOS XE Software. To cause the DoS, the attacker must have the SNMPv2c or earlier read-only community string or valid SNMPv3 user credentials. An authenticated, remote attacker with high privileges could execute code as the root user on an affected device that is running Cisco IOS XE Software. To execute code as the root user, the attacker must have the SNMPv1 or v2c read-only community string or valid SNMPv3 user credentials and administrative or privilege 15 credentials on the affected device. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device over IPv4 or IPv6 networks. This vulnerability is due to a stack overflow condition in the SNMP subsystem of the affected software. 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. Note: This vulnerability affects all versions of SNMP.
| Date | Event | Detail |
|---|---|---|
| October 10, 2024 | Reserved | Reserved by cisco |
| September 24, 2025 | Published | Published (CNA: cisco) |
| September 29, 2025 | KEV ADDED | Added to CISA KEV, remediation due 2025-10-20 |
Authoritative record: CVE-2025-20352 at cve.org
Vendors: cisco
Weaknesses: CWE-121
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-20352 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
