CVE-2020-5135

CRITICAL KEV RANSOMWARE

SonicOS < 6.0.5.3 and SonicOSv < 6.5.4.4 - Remote Code Execution via Malicious Request

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2020-5135 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added March 15, 2022, with confirmed use in ransomware campaigns.

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.

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.2549
EPSS Percentile 96.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact total

Details

CISA KEV 2022-03-15
VulnCheck KEV 2022-03-15
InTheWild.io 2021-09-20
ENISA EUVD EUVD-2020-26382
Ransomware Use Confirmed
CWE
CWE-120
Status published
Products (3)
sonicwall/sonicos 7.0.0.0
sonicwall/sonicos < 6.0.5.3
sonicwall/sonicosv < 6.5.4.4
Published Oct 12, 2020
KEV Added Mar 15, 2022
Tracked Since Feb 18, 2026