Exploited vulnerability · CISA KEV

Is CVE-2024-53704 exploited? Yes: in CISA KEV since 18 Feb 2025

Gociux · SonicWall SonicOS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-53704, SonicWall SonicOS SSLVPN Improper Authentication Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 18 Feb 2025, 40 days after it was published. It is known to be used in ransomware campaigns. It affects SonicWall SonicOS, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What it is

SonicWall SonicOS contains an improper authentication vulnerability in the SSLVPN authentication mechanism that allows a remote attacker to bypass authentication.

What to do

1. Check whether you run it. Look for SonicOS in your asset inventory, including appliances and cloud images. Stack check lists every exploited SonicWall CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 9 Jan 2025.
4. Get told next time. Email alerts when CISA adds a CVE for SonicWall.

Other exploited CVEs in SonicOS

• CVE-2024-40766: SonicWall SonicOS Improper Access Control Vulnerability (9 Sep 2024)
• CVE-2020-5135: SonicWall SonicOS Buffer Overflow Vulnerability (15 Mar 2022)

References

• psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0003
• nvd.nist.gov/vuln/detail/CVE-2024-53704

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in February 2025 · SonicWall scorecard · act-now radar.