Cisco Access Point Software Intermittent IPv6 Gateway Change (cisco-sa-ap-ipv6-gw-tUAzpn9O)

medium Nessus Plugin ID 266404

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, Cisco Access Point Software Intermittent IPv6 Gateway Change is affected by a vulnerability.

- A vulnerability in the IPv6 Router Advertisement (RA) packet processing of Cisco Access Point Software could allow an unauthenticated, adjacent attacker to modify the IPv6 gateway on an affected device. This vulnerability is due to a logic error in the processing of IPv6 RA packets that are received from wireless clients. An attacker could exploit this vulnerability by associating to a wireless network and sending a series of crafted IPv6 RA packets. A successful exploit could allow the attacker to temporarily change the IPv6 gateway of an affected device. This could also lead to intermittent packet loss for any wireless clients that are associated with the affected device. (CVE-2025-20365)

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 CSCwm13005

See Also

http://www.nessus.org/u?f70ea5ee

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwm13005

Plugin Details

Severity: Medium

ID: 266404

File Name: cisco-sa-ap-ipv6-gw-tUAzpn9O.nasl

Version: 1.2

Type: combined

Family: CISCO

Published: 10/2/2025

Updated: 10/3/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.9

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2025-20365

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2025

Vulnerability Publication Date: 9/24/2025

Reference Information

CVE: CVE-2025-20365

CWE: 940

CISCO-SA: cisco-sa-ap-ipv6-gw-tUAzpn9O

IAVA: 2025-A-0704

CISCO-BUG-ID: CSCwm13005