Fireware OS XPath Injection in SSH Authentication Allows Blind Extraction of Configuration Secrets

published 2026-10-27 13 d ago modified 2026-11-04 4 d ago also EUVD-2026-111152

cvss: 8.7; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

An XPath injection vulnerability in WatchGuard Fireware OS's SSH authentication process allows a remote, unauthenticated attacker with access to the management SSH interface to extract sensitive configuration data by submitting a specially crafted request.

Patch / fix

fixed in 1

WatchGuard Fireware OS 12.5.22, 12.12.4, 2026.4

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 4 d ago (2026-11-04)

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA	4.0	8.7	CVSS: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:X

Affected products

WatchGuard Fireware OS

Classification

Weakness

CWE-20 Improper Input Validation
CWE-208 Observable Timing Discrepancy
CWE-643 Improper Neutralization of Data within XPath Expressions

References

psirt.watchguard.com /CVE-2026-93434
vendor-advisory

Sources

CVE List CVE-2026-93434
NVD CVE-2026-93434

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary