CSRF Vulnerability in WatchGuard Fireware OS WebUI Affects Multiple Versions
CVE-2026-4315

7.1HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
30 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-4315?

A Cross-Site Request Forgery (CSRF) vulnerability exists in the WatchGuard Fireware OS WebUI, potentially allowing a remote attacker to instigate a denial-of-service (DoS) condition. This occurs when an authenticated administrator is tricked into visiting a malicious web page, which can disrupt the Fireware WebUI's functionality. The vulnerability affects specific versions of Fireware OS, ranging from 11.8 through 11.12.4+541730, 12.0 through 12.11.8, to 2025.1 through 2026.1.2, making it imperative for users to apply necessary patches and updates.

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Affected Version(s)

Fireware OS 11.8 <= 11.12.4+541730

Fireware OS 12.0 <= 12.11.8

Fireware OS 12.5 <= 12.5.17

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-...
vendor-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Simone Paganessi (https://www.linkedin.com/in/simonepaganessi)
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