CVE-2025-20365

Published Sep 24, 2025 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Aironet Access Point Software (IOS XE Controller)

affected

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

No data.

Vendor	Product	Versions
Cisco	Aironet	—
Cisco	Aironet Access Point	—
Cisco	Aironet Access Point Software	—
Cisco	Cisco Ios	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-31009	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.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.165% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-ipv6-gw-tUAzpn9O

History

Oct 15, 2025 4:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 25, 2025 8:30 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco aironet Cisco aironet Access Point Cisco aironet Access Point Software Cisco cisco Ios
Vendors & Products		Cisco Cisco aironet Cisco aironet Access Point Cisco aironet Access Point Software Cisco cisco Ios

Sep 24, 2025 5:30 PM Description updated. Title updated View changes

Type	Values Removed	Values Added
Description	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.	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.
Title	Cisco Access Point Software Intermittent IPv6 Gateway Change Vulnerability

Sep 24, 2025 5:00 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		Cisco Access Point Software Intermittent IPv6 Gateway Change Vulnerability
Weaknesses		CWE-940
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-ipv6-gw-tUAzpn9O
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}`