Critical severity9.8CISA KEVNVD Advisory· Published Oct 12, 2020· Updated Jun 17, 2026
CVE-2020-5135
CVE-2020-5135
Description
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.
Affected products
5Patches
Vulnerability mechanics
References
2- psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010nvdVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
1- The Gentlemen Ransomware Group Uses Fortinet Exploits, AI, and Custom C2 FrameworksCyber Security News · Jun 3, 2026