CVE-2026-4315 WatchGuard Firebox Cross-Site Request Forgery (CSRF) in Fireware Web UI

What is CVE-2026-4315?

CVE-2026-4315 is a high-severity vulnerability in Watchguard Fireware, published on 30 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-352

Which versions are affected by CVE-2026-4315?

It affects 1 product.

Products include Watchguard Fireware.

How do I fix CVE-2026-4315?

No fix has been published for CVE-2026-4315 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-4315 being exploited?

There is no known exploitation of CVE-2026-4315 in the wild and no public exploit code.

Other vulnerabilities in Watchguard Fireware

• CVE-2022-26318 WatchGuard Firebox and XTM Appliances Arbitrary Code Execution Exploited Critical 9.8
• CVE-2025-14733 WatchGuard Firebox Out of Bounds Write Exploited Critical 9.3
• CVE-2025-9242 WatchGuard Firebox Out-of-Bounds Write Exploited Critical 9.3
• CVE-2022-23176 WatchGuard Firebox and XTM Privilege Escalation Exploited High 8.8
• CVE-2022-31789 Integer overflow in n/a Critical 9.8

All Watchguard Fireware vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4qgx-7r85-6fpx.