# CVE-2024-53704: SonicWall SonicOS SSLVPN Improper Authentication

> Remote attackers can bypass SSLVPN authentication in SonicWall SonicOS, gaining unauthorized access to the network.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H`)
- **Exploited in the wild:** Yes, since 18 Feb 2025 (CISA KEV), used in ransomware
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jan 2025
- **Updated:** 4 Aug 2026
- **Also known as:** GHSA-rwgq-wj29-fx3r

## What is CVE-2024-53704?

CVE-2024-53704 is a high-severity authentication bypass vulnerability in Sonicwall Sonicos, published on 9 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An Improper Authentication vulnerability in the SSLVPN authentication mechanism allows a remote attacker to bypass authentication.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2024-53704?

It affects 1 product.


Products: Sonicwall Sonicos.

## How do I fix CVE-2024-53704?

No fix has been published for CVE-2024-53704 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 11 Mar 2025.

## Is CVE-2024-53704 being exploited?

Yes. Attackers have exploited CVE-2024-53704 in the wild since at least 18 Feb 2025, including in ransomware campaigns.

Public exploit code:

- demonstriert, wie mittels missbräuchlicher Nutzung eines Swap-Cookies eine VPN-Session übernommen werden kann. Wichtig: Dieses Projekt dient ausschliesslich zu Bildungs- und Forschungszwecken – bitte nur in Umgebungen verwenden, in denen Du explizit authorisiert bist. (github_poc): https://github.com/istagmbh/CVE-2024-53704
- Exploit for CVE-2024-53704 - SonicWall SonicOS SSLVPN authentication bypass (github_poc): https://github.com/sfewer-r7/SonicSessionLeak
- SonicWall security audit toolkit with vulnerable CTF lab (CVE-2021-20038, CVE-2024-53704) (github_poc): https://github.com/anir0y/sonicwall-audit-toolkit
- SSL VPN Session Hijacking (nuclei): http/cves/2024/CVE-2024-53704.yaml

## Other vulnerabilities in Sonicwall Sonicos

- [CVE-2020-5135](https://insights.sbomify.com/CVE-2020-5135/): SonicWall SonicOS Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-40766](https://insights.sbomify.com/CVE-2024-40766/): SonicWall SonicOS Improper Access Control (critical 9.3, exploited in the wild)
- [CVE-2025-40600](https://insights.sbomify.com/CVE-2025-40600/): Denial of service in SonicOS (critical 9.8)
- [CVE-2024-22394](https://insights.sbomify.com/CVE-2024-22394/): Auth bypass in SonicOS (critical 9.8)
- [CVE-2022-22274](https://insights.sbomify.com/CVE-2022-22274/): Memory corruption in SonicOS (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-53704 and fix it if it is affected.

What it is: CVE-2024-53704 is a high-severity authentication bypass vulnerability in Sonicwall Sonicos, published on 9 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2024-53704 in the wild since at least 18 Feb 2025, including in ransomware campaigns.

Affected product: Sonicwall Sonicos. 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-2024-53704/ (Markdown: https://insights.sbomify.com/CVE-2024-53704/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-53704
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-53704
- OSV: https://osv.dev/vulnerability/CVE-2024-53704

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-53704/
Summaries are generated and may contain mistakes; the official description above is the record.