CVE-2024-53704

SonicWall SonicOS: SSLVPN Improper Authentication

As of , CVE-2024-53704 in SonicWall SonicOS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 18 February 2025
US federal deadline
11 March 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
KnownCISA changed it from Unknown to Known on 19 December 2025.
EPSS score
0.95Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: psirt.global.sonicwall.comLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA's required action

What the flaw is

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

CISA's description

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

The CVE record's description, from sonicwall

CVE published
9 January 2025
Assigned by
sonicwall
CVSS
8.2 High (CVSS 3.1, from CISA-ADP)
CWE-287
Improper Authentication
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
partial

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.
  4. CISA changed its entry. Ransomware use: Unknown to Known.

SonicOS: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2024-40766Improper Access ControlSonicWall SonicOSPatch this weekRansomware use0.18
CVE-2020-5135Buffer OverflowSonicWall SonicOSPatch this weekRansomware use0.27

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