CVE-2026-121640 WatchGuard AuthPoint Gateway Capture-replay Allows Unauthorized Administrative Actions
Critical 9.1
Published
Updated
Check this codebase for CVE-2026-121640 and fix it if it is affected.
What it is: CVE-2026-121640 is a critical vulnerability in WatchGuard AuthPoint Authentication Gateway, published on 4 Nov 2026.
Exploitation: There is no known exploitation of CVE-2026-121640 in the wild and no public exploit code.
Affected product: WatchGuard AuthPoint Authentication Gateway. 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-2026-121640/ (Markdown: https://insights.sbomify.com/CVE-2026-121640/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-121640?
CVE-2026-121640 is a critical vulnerability in WatchGuard AuthPoint Authentication Gateway, published on 4 Nov 2026.
Official description
An Authentication Bypass by Capture-replay vulnerability in WatchGuard AuthPoint Gateway allows an attacker who has observed a legitimate request between AuthPoint Gateway components to replay it and perform unauthorized administrative actions, including disrupting authentication services.
Weakness: CWE-294
Which versions are affected by CVE-2026-121640?
How do I fix CVE-2026-121640?
No fix has been published for CVE-2026-121640 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-121640 being exploited?
There is no known exploitation of CVE-2026-121640 in the wild and no public exploit code.
Sources
Also known as GHSA-xp5x-55h7-9454.