WatchGuard Firebox Single Sign-On Client Denial-of-Service (CVE-2024-6594) | HOL Guard CVE

High · CVSS 7.5CVE-2024-6594

WatchGuard Firebox Single Sign-On Client Denial-of-Service

Answer in brief

CVE-2024-6594 records a High severity (CVSS 7.5) vulnerability in WatchGuard Firebox Single Sign-On Client Denial-of-Service. The current sources do not mark it as known exploited. The current feed maps watchguard/single_sign-on_client (generic), WatchGuard/SSO Client (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2024Updated Aug 8, 2026Source checked Sep 22, 2026First seen by HOL Aug 8, 2026Material review Aug 8, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps watchguard/single_sign-on_client (generic), WatchGuard/SSO Client (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:watchguard:single_sign-on_client::::::windows::*	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
watchguard/single_sign-on_clientgeneric	0	Not reported
WatchGuard/SSO Clientgeneric	12.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for watchguard/single_sign-on_client, WatchGuard/SSO Client.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 25, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 8, 2026

Sources and claim methodology

Upstream source description

Improper Handling of Exceptional Conditions vulnerability in the WatchGuard Single Sign-On Client on Windows causes the client to crash while handling malformed commands. An attacker with network access to the client could create a denial of service condition for the Single Sign-On service by repeatedly issuing malformed commands.

Quoted source text, attributed separately from HOL analysis.