# CVE-2025-20365: Business logic in Cisco Aironet Access Point Software (IOS XE Controller)

> An adjacent attacker can modify the IPv6 gateway on Cisco Access Points via crafted RA packets, causing intermittent packet loss for wireless clients.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2025
- **Updated:** 15 Oct 2025
- **Also known as:** GHSA-g88p-ppwj-3qff

## What is CVE-2025-20365?

CVE-2025-20365 is a medium-severity vulnerability in Cisco Aironet Access Point Software (IOS XE Controller), published on 24 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

Weakness: CWE-940 (Improper Verification of Source of a Communication Channel)

## Which versions are affected by CVE-2025-20365?


## How do I fix CVE-2025-20365?

No fix has been published for CVE-2025-20365 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-20365 being exploited?

There is no known exploitation of CVE-2025-20365 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-20365 and fix it if it is affected.

What it is: CVE-2025-20365 is a medium-severity vulnerability in Cisco Aironet Access Point Software (IOS XE Controller), published on 24 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-20365 in the wild and no public exploit code.

Affected product: Cisco Aironet Access Point Software (IOS XE Controller). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-20365/ (Markdown: https://insights.sbomify.com/CVE-2025-20365/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20365
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20365
- OSV: https://osv.dev/vulnerability/CVE-2025-20365

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-20365/
Summaries are generated and may contain mistakes; the official description above is the record.