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CVE-2020-5135

Published: Oct 12, 2020Updated: Oct 31, 2025 Sources: CVE List NVD BDUCWE-120
9.8CRITICAL
NVD MITRE
EPSS Score
26.9%
Top 2.1%
CISA KEV
Active Exploitation
Since Mar 15, 2022
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-120

Affected Products

SonicWall
commercial·US
SonicOS
Networking Infrastructure
SonicOSv
Networking Infrastructure
and 2 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 15, 2022
Remediation due:Apr 5, 2022
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

Official Patch Available
Is your org exposed to CVE-2020-5135?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010
psirt.global.sonicwall.com
https://www.securitylab.ru/news/521582.php
securitylab.ru
https://nvd.nist.gov/vuln/detail/CVE-2020-5135
nvd.nist.gov
and 3 more references View all →

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