CVE-2026-93864: high-severity vulnerability in WatchGuard Fireware OS
Fireware OS Link Following in firewalld Allows Local Arbitrary File Overwrite as Root
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.1%
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.
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
Affected products
WatchGuard · Fireware OSRelated CVEs — WatchGuard Fireware OS
In the same product, most dangerous first.
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