Detections
Analytics
Cisco IOS Software SNMP DoS RCE (cisco-sa-snmp-x4LPhte)
high Nessus Plugin ID 266454
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco IOS is affected by a vulnerability.- 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. (CVE-2025-20352)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwq31287See Also
http://www.nessus.org/u?7b02fe37
Plugin Details
Severity: High
ID: 266454
File Name: cisco-sa-snmp-x4LPhte-ios.nasl
Version: 1.2
Type: combined
Family: CISCO
Published: 10/3/2025
Updated: 10/4/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.9
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.6
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C
CVSS Score Source: CVE-2025-20352
CVSS v3
Risk Factor: High
Base Score: 7.7
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios
Required KB Items: Host/Cisco/IOS/Version
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/24/2025
Vulnerability Publication Date: 9/24/2025
CISA Known Exploited Vulnerability Due Dates: 10/20/2025
Reference Information
CVE: CVE-2025-20352