Authentication Bypass Vulnerability in WatchGuard AuthPoint Gateway
CVE-2026-121640

9.1CRITICAL

Key Information:

Vendor

Watchguard

Status
AutHPoint Authentication Gateway
Vendor
CVE Published:
4 November 2026

Badges

👾 Exploit Exists

What is CVE-2026-121640?

The WatchGuard AuthPoint Gateway is susceptible to an authentication bypass via capture-replay attacks. This vulnerability allows an attacker to intercept legitimate requests between AuthPoint Gateway components. By replaying these captured requests, the attacker can execute unauthorized administrative actions, potentially leading to service disruptions and unauthorized access. It is crucial for users of AuthPoint Gateway to apply security measures to mitigate risks associated with this vulnerability.

Affected Version(s)

AuthPoint Authentication Gateway 1.0 < 7.6.0

References

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

CVSS V4

Score:
9.1
Severity:
CRITICAL
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

WatchGuard AI Security Research
.