CVE-2020-5135

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.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010	Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010	Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5135

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:sonicwall:sonicos::::::::
	cpe:2.3:o:sonicwall:sonicos::::::::
	cpe:2.3:o:sonicwall:sonicos::::::::
	cpe:2.3:o:sonicwall:sonicos:7.0.0.0:::::::*
	cpe:2.3:o:sonicwall:sonicosv::::::::

History

22 Oct 2025, 00:17

Type	Values Removed	Values Added
References		() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5135 -

21 Oct 2025, 20:18

Type	Values Removed	Values Added
References	~~{'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5135', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}~~

21 Oct 2025, 19:18

Type	Values Removed	Values Added
References		() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5135 -

02 Apr 2025, 20:19

Type	Values Removed	Values Added
CWE	~~CWE-119~~

Information

Published : 2020-10-12 11:15

Updated : 2025-10-22 00:17

NVD link : CVE-2020-5135

Mitre link : CVE-2020-5135

CVE.ORG link : CVE-2020-5135

JSON object : View

Products Affected

sonicwall

sonicos
sonicosv

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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