CVE-2020-5139 - CVE House
Back to Database
Status published High CVE-2020-5139

A vulnerability in SonicOS SSLVPN service allows a remote unauthenticated...

Vulnerability Description

A vulnerability in SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS) due to the release of Invalid pointer and leads to a firewall crash. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version SonicOS 7.0.0.0.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-5139

Credits & Attribution

No credits recorded in the NVD database.

References

More from SonicWall

View All →
CVE-2025-40605
A Path Traversal vulnerability has been identified in the Email...
Unknown 0
CVE-2025-40604
Download of Code Without Integrity Check Vulnerability in the SonicWall...
Unknown 0
CVE-2025-40603
A potential exposure of sensitive information in log files in...
Unknown 0
CVE-2025-40602
A local privilege escalation vulnerability due to insufficient authorization in...
Unknown 0
CVE-2025-40601
A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service...
Unknown 0

Affected Vendor

Affected Software

SonicOS
Vulnerable Versions:
SonicOS 6.5.4.7-79n and earlier, SonicOS 5.9.1.7-2n and earlier, SonicOS 5.9.1.13-5n and earlier, SonicOS 6.5.1.11-4n and earlier, SonicOS 6.0.5.3-93o and earlier, SonicOSv 6.5.4.4-44v-21-794 and earlier, SonicOS 7.0.0.0-1

Timeline

Official Publish: October 12th, 2020
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-763

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.