CVE-2026-3987

highpriority · track · 29EPSS 0.007 · 52 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.68% (52nd) EPSS

CVSS 7.2 · high

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.6

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 5.9

v4.08.6highCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.6highCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/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:Xsecondary

v4.06.1mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22US

affected products (8)

Products and version ranges known to be affected.

WatchGuard Firebox <12.12all versionscert_bundDE
WatchGuard Firebox <2026.2all versionscert_bundDE
WatchGuard Firebox< 12.12cert_bundDE
WatchGuard Firebox< 2026.2cert_bundDE
WatchGuard Fireware OS12.6.1 → 12.12enisa_euvdEU
WatchGuard Fireware OS2025.1 → 2026.2enisa_euvdEU
watchguard fireware12.6.1 → 12.12nvdUScpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*
watchguard fireware2025.1 → 2026.2nvdUScpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0952WatchGuard Firebox: Schwachstelle ermöglicht CodeausführungDeutsch2026-04-01csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in WatchGuard Firebox ausnutzen, um beliebigen Programmcode auszuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-04-01modified 2026-10-26

references (5)

External citations — patches, advisories, analysis.

scry

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