CVE-2020-5135

CVE-2020-5135

Vendor Sonicwall
Product SonicOS
Weakness CWE-120
KEV Status Known Exploited
Published October 12, 2020
Last update October 21, 2025

CVSS base score

What the vulnerability does

01Description

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.

CISA mandated remediation

02CISA Required Action

Apply updates per vendor instructions.

Key dates

03Disclosure timeline

October 12, 2020 CVE published
October 21, 2025 Record updated