CVE-2026-121638

CVE Enrichment

CVSS: 9.1 CRITICAL
EPSS: 0.29%
EPSS Percentile: 21.88%
CISA KEV: Not listed

Description

An Improper Certificate Validation vulnerability in WatchGuard AuthPoint Gateway allows an attacker with an on-path network position to intercept and modify communications between the AuthPoint Gateway and local authentication providers.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: 5d1c2695-1a31-4499-88ae-e847036fd7e3
Published: 04-Nov-2026 22:17
Last Modified: 05-Nov-2026 02:17
EPSS Date: 2026-11-05
CWE: CWE-295

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:P /
                            PR:N /
                            UI:N /
                            VC:H /
                            VI:H /
                            VA:N /
                            SC:N /
                            SI:N /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

CNA Products / Version Status

WatchGuard · AuthPoint Authentication Gateway Source: CNA · 5d1c2695-1a31-4499-88ae-e847036fd7e3
Default status: unaffected

1.0 ≤ version < 7.6.0 — affected (semver)

References

5d1c2695-1a31-4499-88ae-e847036fd7e3

Last enrichment sync: 05-Nov-2026 22:10
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

The company rolled out fixes for three critical authentication issues (CVE-2026-121639, CVE-2026-121638, and CVE-2026-121640) and a high-severity integrity validation bug (CVE-2026-121637) in AuthPoint Authentication Cisco and WatchGuard Patch Flaws; SonicWall Leaves GMS Bugs Unfixed

CVE (8)

Vendors (4)

Products (6)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.