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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2024-47659 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. This issue affects Single Sign-On Client: through 12.7.
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). 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 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. This issue affects Single Sign-On Client: through 12.7. 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.
First Time appeared Watchguard sso Client
CPEs cpe:2.3:a:watchguard:sso_client:*:*:*:*:*:*:*:*
Vendors & Products Watchguard sso Client
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


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

Type Values Removed Values Added
Metrics epss

{'score': 0.00424}

epss

{'score': 0.00464}


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

Type Values Removed Values Added
CPEs cpe:2.3:a:watchguard:single_sign-on_client:*:*:*:*:*:*:*:* cpe:2.3:a:watchguard:single_sign-on_client:*:*:*:*:*:windows:*:*

Wed, 25 Sep 2024 14:30:00 +0000

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

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


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

Type Values Removed Values Added
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. This issue affects Single Sign-On Client: through 12.7.
Title WatchGuard Firebox Single Sign-On Client Denial-of-Service
Weaknesses CWE-755
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-07T23:42:26.069Z

Reserved: 2024-07-09T02:09:05.229Z

Link: CVE-2024-6594

cve-icon Vulnrichment

Updated: 2024-09-25T13:48:02.282Z

cve-icon NVD

Status : Analyzed

Published: 2024-09-25T12:15:05.397

Modified: 2026-06-17T08:18:18.547

Link: CVE-2024-6594

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses