CVE-2025-20365
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 5% of all known CVEs.
References
Related Vulnerabilities
Other CWE-940 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-61932 | Critical | 9.8 | 2.6% | KEV | - |
| CVE-2024-32388 | Medium | 5.3 | 1.2% | - | Fix |
| CVE-2025-23018 | Medium | 5.4 | 1.0% | - | - |
| CVE-2023-48387 | High | 8.8 | 1.0% | - | - |
| CVE-2023-3663 | High | 8.8 | 1.0% | - | Fix |
| CVE-2025-23019 | Medium | 5.4 | 1.0% | - | - |
Common questions
How do I fix CVE-2025-20365?
No published fix for CVE-2025-20365 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2025-20365 being actively exploited?
Not that we know of. CVE-2025-20365 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.15% is the estimated probability that it will be exploited in the next 30 days. That is higher than 5% of all scored CVEs.
How severe is CVE-2025-20365?
CVE-2025-20365 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-09-24.