CVE-2026-4315 PUBLISHED

WatchGuard Firebox Cross-Site Request Forgery (CSRF) in Fireware Web UI

Assigner: WatchGuard
Reserved: 17.03.2026 Published: 30.03.2026 Updated: 30.03.2026

A Cross-Site Request Forgery (CSRF) vulnerability in the WatchGuard Fireware OS WebUI could allow a remote attacker to trigger a denial-of-service (DoS) condition in the Fireware Web UI by convincing an authenticated administrator into visiting a malicious web page.This issue affects Fireware OS: 11.8 through 11.12.4+541730, 12.0 through 12.11.8, and 2025.1 through 2026.1.2.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	WatchGuard
Product	Fireware OS
Versions	Default: unaffected affected from 11.8 to 11.12.4+541730 (incl.) affected from 12.0 to 12.11.8 (incl.) affected from 12.5 to 12.5.17 (incl.) affected from 2025.1 to 2026.1.2 (incl.)

Exploits

WatchGuard is not aware of any exploitation of this issue in the wild.

Credits

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

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00006

Problem Types

CWE-352 Cross-Site Request Forgery (CSRF) CWE

Impacts

CAPEC-62 Cross Site Request Forgery