# CVE-2026-121640

Replay authentication bypass in WatchGuard AuthPoint Gateway allowing unauthorized admin actions.

- Page: https://www.vulneraibility.com/cve/CVE-2026-121640
- CVSS: 9.1
- Known exploited: not in CISA KEV as of our last sync
- CISA SSVC: exploitation none, automatable no, technical impact partial (assessed 2026-11-04)
- Weakness: CWE-294
- Published: 2026-11-04

## Affected versions

- WatchGuard AuthPoint Authentication Gateway: affected >= 1.0 and < 7.6.0

A version outside these ranges is not a statement that it is unaffected.

## Impact

Replay-based authentication bypass lets attackers perform unauthorized administrative actions and disrupt authentication/MFA services.

## Action

Immediate action required

## Recommendation

Apply vendor mitigation/patch ASAP, restrict gateway access, rotate credentials, monitor logs.

## References

- [advisory] https://psirt.watchguard.com/CVE-2026-121640

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.