Cisco Aironet Access Point up to 17.15.1 IPv6 Router Advertisement verification of source

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco Aironet Access Point. This issue affects some unknown processing of the component IPv6 Router Advertisement Handler. This manipulation causes verification of source. This vulnerability is tracked as CVE-2025-20365. The attack is only possible within the local network. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Cisco Aironet Access Point. Affected by this vulnerability is some unknown functionality of the component IPv6 Router Advertisement Handler. The manipulation with an unknown input leads to a verification of source vulnerability. The CWE definition for the vulnerability is CWE-940. The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin. As an impact it is known to affect integrity. The summary by CVE is:

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.

It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2025-20365 since 10/10/2024. The exploitation appears to be easy. The attack can only be initiated within the local network. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/02/2025).

The vulnerability scanner Nessus provides a plugin with the ID 266404 (Cisco Access Point Software Intermittent IPv6 Gateway Change (cisco-sa-ap-ipv6-gw-tUAzpn9O)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (266404). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Wireless LAN Software

Vendor

• Cisco

Name

• Aironet Access Point

Version

• 16.10.1
• 16.10.1e
• 16.10.1s
• 16.11.1
• 16.11.1a
• 16.11.1b
• 16.11.1c
• 16.12.1
• 16.12.1s
• 16.12.1t
• 16.12.2s
• 16.12.2t
• 16.12.3
• 16.12.3s
• 16.12.4
• 16.12.4a
• 16.12.5
• 16.12.6
• 16.12.6a
• 16.12.7
• 16.12.8
• 17.1.1
• 17.1.1s
• 17.1.1t
• 17.1.2
• 17.1.3
• 17.2.1
• 17.2.1a
• 17.2.2
• 17.2.3
• 17.3.1
• 17.3.2
• 17.3.2a
• 17.3.3
• 17.3.4
• 17.3.4c
• 17.3.5
• 17.3.5a
• 17.3.5b
• 17.3.6
• 17.3.7
• 17.3.8
• 17.3.8a
• 17.4.1
• 17.4.2
• 17.5.1
• 17.6.1
• 17.6.2
• 17.6.3
• 17.6.4
• 17.6.5
• 17.6.5a
• 17.6.6
• 17.6.6a
• 17.6.7
• 17.6.8
• 17.7.1
• 17.8.1
• 17.9.1
• 17.9.2
• 17.9.3
• 17.9.4
• 17.9.4a
• 17.9.5
• 17.9.6
• 17.9.7
• 17.10.1
• 17.11.1
• 17.12.1
• 17.12.2
• 17.12.3
• 17.12.5
• 17.13.1
• 17.14.1
• 17.15.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

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