What is CVE-2026-4315?

CVE-2026-4315 is a medium-severity vulnerability in Watchguard Firebox Cloud, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2026-03-30.

How severe is CVE-2026-4315?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CSRF in Watchguard Firebox Cloud

CVE-2026-4315

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.

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.002 (13.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

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

References

5d1c2695-1a31-4499-88ae-e847036fd7e3 (vendor-advisory, Vendor Advisory)
5d1c2695-1a31-4499-88ae-e847036fd7e3 (vendor-advisory, Broken Link)

Frequently asked questions

What is CVE-2026-4315?: CVE-2026-4315 is a medium-severity vulnerability in Watchguard Firebox Cloud, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2026-03-30.
How severe is CVE-2026-4315?: Medium severity. CVSS v3 base score is 6.5 out of 10.