CVEvulnerability

CVE-2025-20352

7.7 HIGH Known exploited Published 2025-09-24 Modified 2026-09-26 Official page ↗

CISA Known Exploited Vulnerability

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

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.

Added to KEV
2025-09-29
Remediation due
2025-10-20
Ransomware use
Unknown
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.
Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-x4LPhte ; https://nvd.nist.gov/vuln/detail/CVE-2025-20352
Status
Analyzed
Published
2025-09-24
Last modified
2026-09-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.7 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weaknesses
CWE-121

Description

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.

Affected configurations

• cisco ios xe sd-wan 16.9.1 • cisco ios xe sd-wan 16.9.2 • cisco ios xe sd-wan 16.9.3 • cisco ios xe sd-wan 16.9.4 • cisco ios xe sd-wan 16.10.1 • cisco ios xe sd-wan 16.10.2 • cisco ios xe sd-wan 16.10.3 • cisco ios xe sd-wan 16.10.3a • cisco ios xe sd-wan 16.10.3b • cisco ios xe sd-wan 16.10.4 • cisco ios xe sd-wan 16.10.5 • cisco ios xe sd-wan 16.10.6 • cisco ios xe sd-wan 16.11.1a • cisco ios xe sd-wan 16.12.1b • cisco ios xe sd-wan 16.12.1d • cisco ios xe sd-wan 16.12.1e • cisco ios xe sd-wan 16.12.2r • cisco ios xe sd-wan 16.12.3 • cisco ios xe sd-wan 16.12.4 • cisco ios xe sd-wan 16.12.4a • cisco ios xe sd-wan 16.12.5 • cisco ios xe 3.5.0e • cisco ios xe 3.5.0sq • cisco ios xe 3.5.1e • cisco ios xe 3.5.1sq • cisco ios xe 3.5.2e • cisco ios xe 3.5.2sq • cisco ios xe 3.5.3e • cisco ios xe 3.5.3sq • cisco ios xe 3.5.4sq • cisco ios xe 3.5.5sq • cisco ios xe 3.5.6sq • cisco ios xe 3.5.7sq • cisco ios xe 3.5.8sq • cisco ios xe 3.6.0e • cisco ios xe 3.6.1e • cisco ios xe 3.6.2ae • cisco ios xe 3.6.2e • cisco ios xe 3.6.3e • cisco ios xe 3.6.4e • cisco ios xe 3.6.5ae • cisco ios xe 3.6.5e • cisco ios xe 3.6.6e • cisco ios xe 3.6.7be • cisco ios xe 3.6.7e • cisco ios xe 3.6.8e • cisco ios xe 3.6.9e • cisco ios xe 3.6.10e • cisco ios xe 3.7.0e • cisco ios xe 3.7.1e • cisco ios xe 3.7.2e • cisco ios xe 3.7.3e • cisco ios xe 3.7.4e • cisco ios xe 3.7.5e • cisco ios xe 3.8.0e • cisco ios xe 3.8.1e • cisco ios xe 3.8.2e • cisco ios xe 3.8.3e • cisco ios xe 3.8.4e • cisco ios xe 3.8.5ae … and 1036 more

Related

Weakness · CWE (1)

  • CWE-121 Stack-based Buffer Overflow weakness

References