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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2024-47657 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 Authentication Bypass.This issue affects the Authentication Gateway: through 12.10.2; Windows Single Sign-On Client: through 12.7; MacOS Single Sign-On Client: through 12.5.4.
Fixes

Solution

No solution given by the vendor.


Workaround

An attacker must have already established network access to exploit this vulnerability. WatchGuard recommends using Windows Firewall rules to restrict TCP port 4116 network access to the Single Sign-On Client to only allow connections from the Authentication Gateway (SSO Agent), and restricting TCP port 4114 network access to the Authentication Gateway to only allow connections from the Firebox. Windows administrators can use Group Policy objects to add Windows firewall rules to their endpoints.

History

Sat, 08 Aug 2026 00:00:00 +0000

Type Values Removed Values Added
Description 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 Authentication Bypass.This issue affects the Authentication Gateway: through 12.10.2; Windows Single Sign-On Client: through 12.7; MacOS Single Sign-On Client: through 12.5.4. 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.
First Time appeared Watchguard sso Agent
Watchguard sso Client
CPEs cpe:2.3:a:watchguard:sso_agent:*:*:*:*:*:*:*:*
cpe:2.3:a:watchguard:sso_client:*:*:*:*:*:*:*:*
Vendors & Products Watchguard sso Agent
Watchguard sso Client
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


Wed, 15 Oct 2025 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-306

Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.01273}

epss

{'score': 0.01378}


Wed, 25 Sep 2024 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Watchguard
Watchguard authentication Gateway
Watchguard single Sign-on Client
CPEs cpe:2.3:a:watchguard:authentication_gateway:*:*:*:*:*:*:*:*
cpe:2.3:a:watchguard:single_sign-on_client:*:*:*:*:*:macos:*:*
cpe:2.3:a:watchguard:single_sign-on_client:*:*:*:*:*:windows:*:*
Vendors & Products Watchguard
Watchguard authentication Gateway
Watchguard single Sign-on Client
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 25 Sep 2024 11:30:00 +0000

Type Values Removed Values Added
Description 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 Authentication Bypass.This issue affects the Authentication Gateway: through 12.10.2; Windows Single Sign-On Client: through 12.7; MacOS Single Sign-On Client: through 12.5.4.
Title WatchGuard Firebox Single Sign-On Agent Protocol Authorization Bypass
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-07T23:46:43.531Z

Reserved: 2024-07-09T02:09:02.539Z

Link: CVE-2024-6592

cve-icon Vulnrichment

Updated: 2024-09-25T14:29:06.233Z

cve-icon NVD

Status : Modified

Published: 2024-09-25T12:15:05.027

Modified: 2026-06-17T08:18:18.323

Link: CVE-2024-6592

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses