WatchGuard Firebox Single Sign-On Agent Protocol Authorization Bypass (CVE-2024-6592) | HOL Guard CVE

Critical · CVSS 9.1CVE-2024-6592

WatchGuard Firebox Single Sign-On Agent Protocol Authorization Bypass

Answer in brief

CVE-2024-6592 records a Critical severity (CVSS 9.1) vulnerability in WatchGuard Firebox Single Sign-On Agent Protocol Authorization Bypass. The current sources do not mark it as known exploited. The current feed maps watchguard/authentication_gateway (generic), watchguard/single_sign-on_client (generic), WatchGuard/SSO Agent (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: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.1. 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/authentication_gateway (generic), watchguard/single_sign-on_client (generic), WatchGuard/SSO Agent (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:authentication_gateway::::::::	Not reported	Not reported
cpe:2.3:a:watchguard:single_sign-on_client::::::macos::*	Not reported	Not reported
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/authentication_gatewaygeneric	>=0 <12.10.2	12.10.2
watchguard/single_sign-on_clientgeneric	0	Not reported
WatchGuard/SSO Agentgeneric	12.0	Not reported
WatchGuard/SSO Clientgeneric	12.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for watchguard/authentication_gateway, watchguard/single_sign-on_client, WatchGuard/SSO Agent.
Review the reported fix. Update watchguard/authentication_gateway to 12.10.2 if you use the affected versions. Test the change in a non-production environment first.

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

An incorrect authorization vulnerability in the protocol communication between the WatchGuard Authentication Gateway (aka Single Sign-On Agent) on Windows and the WatchGuard Single Sign-On Client on Windows and MacOS allows an attacker with network access to forge communications to affected components. In the event an attacker has already gained network access, they could exploit this vulnerability to retrieve authenticated usernames and group memberships from the Single Sign-On Agent or send arbitrary account and group information to the Single Sign-On Agent for their host. This vulnerability cannot be used by an attacker to gain access to user credentials.

Quoted source text, attributed separately from HOL analysis.