Medium severity · published Mar 30, 2026
CVE-2026-4315
WatchGuard Firebox Cross-Site Request Forgery (CSRF) in Fireware Web UI
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
2025.1 before 2026.2; 12.0 before 12.12; 11.8 through 11.12.4+541730; 12.0 before 12.11.9; 12.0 before 12.5.18 · source: vendor
FI
Fireware · Watchguard
2025.1 before 2026.2; 12.5 before 12.5.18; 11.8 before 11.12.4; 11.12.4; 11.12.4; 12.0 before 12.12 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4315
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4315
Broken Link
https://psirt.watchguard.com/CVE-2026-4315
Vendor Advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00006
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