CVE-2026-78009

highpriority · track · 0EPSS 0.005 · 46 %ileDE

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.54% (46th) EPSS

CVSS 8.7 · high

Is it mine?

12 products

Check your exposure

Who says so?

1 sources

cert_bund

EPSS · scored 2026-10-27

An out-of-bounds read vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

cvss

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

8.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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

v4.06.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-20US

affected products (12)

Products and version ranges known to be affected.

WatchGuard Firebox OS <12.12.1all versionscert_bundDE
WatchGuard Firebox OS <12.12.2all versionscert_bundDE
WatchGuard Firebox OS <2026.2.1all versionscert_bundDE
WatchGuard Firebox OS <2026.2.2all versionscert_bundDE
WatchGuard Firebox OS T15/T35 <12.5.18all versionscert_bundDE
WatchGuard Firebox OS T15/T35 <12.5.20all versionscert_bundDE
WatchGuard Firebox≤ OS T15/T35 <12.5.20cert_bundDE
WatchGuard Firebox≤ OS <12.12.1cert_bundDE
WatchGuard Firebox≤ OS <12.12.2cert_bundDE
WatchGuard Firebox≤ OS <2026.2.1cert_bundDE
WatchGuard Firebox≤ OS <2026.2.2cert_bundDE
WatchGuard Firebox≤ OS T15/T35 <12.5.18cert_bundDE

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3068WatchGuard Firebox OS: Mehrere SchwachstellenDeutsch2026-08-27csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in WatchGuard Firebox OS ausnutzen, um beliebigen Code – einschließlich Code mit Root-Rechten – auszuführen oder einen Denial-of-Service-Zustand herbeizuführen.

sources

Which sources assert this record, and when.

cert_bund NVD CVE.org MITRE

published 2026-08-28modified 2026-09-03

references (1) nvd

External citations — patches, advisories, analysis.

https://psirt.watchguard.com/CVE-2026-78009

scry

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