CVE-20XX-?
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Watchguard Fireware CVEs.

Published CVEs affecting Watchguard Fireware, ranked by exploit odds.

4 CVEs · updated 2026-11-06 20:33 UTC

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  1. CVE-2022-26318

    On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before 12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2.

    Drop everything exploited Code execution Network gear Watchguard Fireware

    9.8 CRITICAL 78% exploit odds Fix listed
  2. CVE-2026-13371

    An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.

    Code execution Watchguard Fireware

    6.9 MEDIUM 0.6% exploit odds Fix listed
  3. CVE-2026-13046

    A deserialization of untrusted data vulnerability in WatchGuard Fireware OS's SAML single sign-on session handling (samld) allows an attacker who has already obtained the ability to write files on the appliance to execute arbitrary code in the context of the samld service by causing samld to load a maliciously crafted session file.

    Code execution Watchguard Fireware

    7.5 HIGH 0.4% exploit odds Fix listed
  4. CVE-2026-4266

    An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user. Note, this vulnerability does not affect Firebox platforms that do not support the Access Portal feature, including the T15 and T35.

    Code execution Watchguard Fireware

    8.4 HIGH 0.3% exploit odds Fix listed

All CVEs affecting Watchguard Fireware that appear in CVE.org and NVD, sorted by how likely they are to be exploited (EPSS), with fix status and timeline.