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TI-2026-85074 Aliases CVE-2026-121637GHSA-w279-432p-jjfg

Improper HMAC validation in WatchGuard AuthPoint Gateway allows forged logins

Priority LOW 38CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

WatchGuard AuthPoint Authentication Gateway versions from 1.0 before 7.6.0 are affected. An improper integrity validation flaw (CWE-345) in the LDAP authentication callback lets a network attacker who has obtained a valid header signature forge the authentication result and transaction identifier in the request body. The forged result can produce unauthorized session outcomes. The CVSS 4.0 base score is 8.9 (HIGH).

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

An improper integrity validation vulnerability in WatchGuard AuthPoint Gateway's LDAP authentication callback allows a network attacker who has obtained a valid header signature to forge the authentication result and transaction identifier in the request body, resulting in unauthorized session outcomes.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00264 18th percentileScored 2026-11-07
Fix Fixed AuthPoint Authentication Gateway (WatchGuard): 7.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WatchGuardAuthPoint Authentication Gateway1.0 to before 7.6.07.6.0Patch availableCNA
  • AuthPoint Authentication Gateway VendorWatchGuard Affected 1.0 to before 7.6.0 Fixed in 7.6.0 Patch available CNA

Remediation

Upgrade WatchGuard AuthPoint Authentication Gateway to version 7.6.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA AuthPoint Authentication Gateway (WatchGuard) Fixed in 7.6.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    WatchGuard AuthPoint Authentication Gateway 7.6.0

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-85076 Missing authentication in WatchGuard AuthPoint Gateway allows denial of servicePriority MEDIUM 47
    • TI-2026-85075 WatchGuard AuthPoint Gateway certificate validation flaw enables interceptionPriority MEDIUM 41
    • TI-2026-85077 Capture-replay authentication bypass in WatchGuard AuthPoint GatewayPriority MEDIUM 40
    Show all 4 records →

Timeline

  1. 2026-11-04 Threatist record created from CVE-2026-121637
  2. 2026-11-04 Alias added: GHSA-w279-432p-jjfg
  3. 2026-11-04 CISA SSVC decision points changed
  4. 2026-11-04 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2022-09698 On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-13451 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-08474 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
  • TI-2022-07330 WatchGuard Firebox and XTM appliances allow a remote attacker with unprivileged… KEVCVSS 3.1HIGH 8.8
  • TI-2023-19293 A DLL hijacking vulnerability in Panda Security VPN for Windows prior to version v15.14.8… CVSS 3.1MEDIUM 6.5
  • TI-2015-04587 Watchguard XCS 9.2 and 10.0 before build 150522 allow remote authenticated users to… CVSS 2.0MEDIUM 6.5
See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences