CVE-2026-93857

UNKNOWN 0.0

Fireware OS Pre-Authentication Stack Buffer Overflow in SIP Proxy Allows Remote Code Execution

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted request through a policy that uses the SIP proxy.

CWE	CWE-120 CWE-121 CWE-787
Vendor	watchguard
Product	fireware os
Published	Oct 27, 2026

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Affected Versions

WatchGuard / Fireware OS

2025.1 < 2026.4 12.0 < 12.12.4

WatchGuard / Fireware OS

12.0 < 12.5.22

References

NVD ↗ CVE.org ↗ EPSS Data ↗

psirt.watchguard.com: https://psirt.watchguard.com/CVE-2026-93857

Credits

Laurent GAFFIE , secorizon.com