AI and data stack advisories

Severe, 6 weeks977Projects326

977 severe, 6 weeks · 326 projects

WatchGuard TechnologiesCVE-2026-93864

WatchGuard Technologies Fireware OS: code execution

WatchGuard Technologies

CVE-2026-93864 · Published Oct 27, 2026 · updated Oct 29, 2026

High7.1
Fix: upgrade to 2026.4 or later (3 fixed versions below)
WatchGuard Technologies advisory

A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and triggering a list update. Written content is partially constrained.

Affected versions

PackageAffectedFixed in
Fireware OS
Product
>= 2025.1, < 2026.42026.4
>= 12.0, < 12.12.412.12.4
>= 12.0, < 12.5.2212.5.22
Details and references
CVSS 4.0
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/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
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-22, CWE-59, CWE-73, CWE-377

More WatchGuard Technologies advisories

All WatchGuard Technologies
Critical 9.2Oct 27WatchGuard Technologies Fireware OS: integer overflowCVE-2026-93866fixed in 2026.4 +2High 8.7Oct 27WatchGuard Technologies Fireware OS: XPath injectionCVE-2026-93434fixed in 12.5.22 +2Critical 9.2Oct 27WatchGuard Technologies Fireware OS: stack buffer overflowCVE-2026-93857fixed in 2026.4 +2High 7.2Oct 27WatchGuard Technologies Fireware OS: out-of-bounds readCVE-2026-93862fixed in 2026.4 +2Critical 9.2Oct 27WatchGuard Technologies Fireware OS: missing authenticationCVE-2026-93865fixed in 2026.4 +2Medium 5.7Oct 27WatchGuard Technologies Fireware OS: improper authenticationCVE-2026-82332fixed in 2026.4 +1