# CVE-2024-6592: WatchGuard Firebox Single Sign-On Agent Protocol Authorization Bypass

> An attacker with network access can forge communications to retrieve or modify authenticated user and group information in WatchGuard SSO components.

- **Severity:** Critical 9.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Sep 2024
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-fgxf-657w-ggqj

## What is CVE-2024-6592?

CVE-2024-6592 is a critical missing authorization vulnerability in WatchGuard SSO Agent, published on 25 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-863 (Incorrect Authorization), CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2024-6592?

It affects 2 products.


Products: Watchguard Authentication Gateway, Watchguard Single Sign-on Client.

## How do I fix CVE-2024-6592?

No fix has been published for CVE-2024-6592 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-6592 being exploited?

There is no known exploitation of CVE-2024-6592 in the wild and no public exploit code.

Public exploit code:

- Client Implementation for the WatchGuard SSO Agent Protocol used for Security Research (CVE-2024-6592, CVE-2024-6593, CVE-2024-6594) (github_poc): https://github.com/RedTeamPentesting/watchguard-sso-client

## Other vulnerabilities in WatchGuard SSO Agent

- [CVE-2024-6593](https://insights.sbomify.com/CVE-2024-6593/): WatchGuard Firebox Single Sign-On Agent Management Interface Authentication Bypass (critical 9.3)
- [CVE-2026-95676](https://insights.sbomify.com/CVE-2026-95676/): AuthPoint Gateway Improper Authentication in LDAP Sync Allows First-Factor Authentication Bypass (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-6592 and fix it if it is affected.

What it is: CVE-2024-6592 is a critical missing authorization vulnerability in WatchGuard SSO Agent, published on 25 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-6592 in the wild and no public exploit code.

Affected product: WatchGuard SSO Agent. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-6592/ (Markdown: https://insights.sbomify.com/CVE-2024-6592/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-6592
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-6592
- OSV: https://osv.dev/vulnerability/CVE-2024-6592

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-6592/
Summaries are generated and may contain mistakes; the official description above is the record.