CVE-2024-53704 — Sonicos
CRITICALCVE-2024-53704 is a critical-severity (CVSS 9.8) Improper Authentication vulnerability in sonicwall sonicos. It is in CISA's Known Exploited Vulnerabilities catalog (added 2025-02-18) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
An Improper Authentication vulnerability in the SSLVPN authentication mechanism allows a remote attacker to bypass authentication.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2025-02-18 — including use in ransomware campaigns. Federal agencies were required to remediate by 2025-03-11.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2024-53704.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2024-53704 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 394,415 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
An Improper Authentication vulnerability in the SSLVPN authentication mechanism allows a remote attacker to bypass authentication.
Affected Products
sonicossonicwallDetection & mitigation playbook
Vendor / applianceDetect
Inventory every sonicwall sonicos deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2024-53704 yet — track the sonicwall sonicos advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2024-53704
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2024-53704 -u https://target- Template
- SSL VPN Session Hijacking
- Severity
- critical
- Impact
- Unauthenticated attackers can hijack SSL VPN sessions by bypassing authentication mechanisms and gaining unauthorized access to the VPN.
- Remediation
- Update SonicWall to a version that patches CVE-2024-53704 as specified in PSIRT advisory SNWLID-2025-0003.
Template by ProjectDiscovery nuclei-templates (johnk3r), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2024-53704 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.