01 Record
CVE-2026-13371
WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization
MediumPUBLISHEDCNA: WatchGuard
CNA base score6.9 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
02 Description
WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.58% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 47.9% of scored records. A rank, not a probability.
- NVD base score
- 6.9 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-10-25.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-07-02 23:04Z3 MO AGO
- Last updated
- 2026-08-27 22:58Z2 MO AGO
- Reserved
- 2026-06-25
- Assigning CNA
- WatchGuard
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.9)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- CWE-502Deserialization of Untrusted DataBase
- Data version
- 5.2
- Document digest
- 7509721948de55880e0eab96c3f820733bef02992ea604d566d081c162a2a2f3
05 Affected products
VendorProductVersionsPlatforms
WatchGuardFireware OS2025.1 to < 2026.2.1, 12.0 to < 12.12.1, 12.0 to < 12.11.9, 12.0 to < 12.5.19Default, EUCC, T15/T35
06 References
- psirt.watchguard.comhttps://psirt.watchguard.com/CVE-2026-13371
- www.watchguard.comhttps://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014
07 Remediation
Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9, Fireware OS 12.5.19