CVE-2026-4315: WatchGuard Firebox Cross-Site Request Forgery (CSRF) in Fireware Web UI
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
WatchGuard Fireware OS WebUIto a version that resolves this vulnerability.Fixed in 2026.2 - Upgrade
Upgrade
WatchGuard Fireware OS WebUIto a version that resolves this vulnerability.Fixed in 12.12 - Upgrade
Upgrade
WatchGuard Fireware OS WebUIto a version that resolves this vulnerability.Fixed in 12.5.18 - Compensating control
Protect the Fireware Web UI from CSRF/abuse by preventing untrusted browsers from reaching the admin UI via compensating network/access controls (e.g., restrict administrative access to trusted networks/users and limit Web UI exposure).
Event History
Frequently Asked Questions
What is the severity of CVE-2026-4315?
CVE-2026-4315 is classified as a high severity vulnerability due to its potential to trigger a denial-of-service condition.
How do I fix CVE-2026-4315?
To remediate CVE-2026-4315, update the WatchGuard Fireware OS to the latest version as specified by WatchGuard.
What types of attacks are possible with CVE-2026-4315?
CVE-2026-4315 allows an attacker to perform cross-site request forgery (CSRF) attacks that can lead to a denial-of-service condition.
What software versions are affected by CVE-2026-4315?
CVE-2026-4315 affects specific versions of WatchGuard Fireware OS from 11.8 to 12.11.8 and 2025.1 to 2026.1.2 inclusive.
Who is at risk from CVE-2026-4315?
Administrators using the affected versions of WatchGuard Fireware OS are at risk from CVE-2026-4315, particularly from CSRF attacks.