SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2024-53704

SonicWall SonicOS SSLVPN Improper Authentication Vulnerability

KEVCRITICAL 9.8EPSS 95.3%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 11 March 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

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

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
95.31% probability · 100th percentile
Public exploits
None in Exploit-DB
CISA KEV
Listed 18 February 2025 · due 11 March 2025 · used in ransomware campaigns
Weakness
CWE-287
Affected
sonicwall/sonicos
Source
PSIRT@sonicwall.com
EPSS trend
0%50%100%30 October 2026: 95.31%30 October 202630 October 2026

EPSS 95.3% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0003 ; https://nvd.nist.gov/vuln/detail/CVE-2024-53704

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.