CVE-2020-5143 Information disclosure in SonicOS

What is CVE-2020-5143?

CVE-2020-5143 is a medium-severity vulnerability in Sonicwall Sonicos, published on 12 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SonicOS SSLVPN login page allows a remote unauthenticated attacker to perform firewall management administrator username enumeration based on the server responses. 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.

Weakness: CWE-203

Which versions are affected by CVE-2020-5143?

It affects 2 products.

Products include Sonicwall Sonicos, Sonicwall Sonicosv.

How do I fix CVE-2020-5143?

No fix has been published for CVE-2020-5143 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-5143 being exploited?

There is no known exploitation of CVE-2020-5143 in the wild and no public exploit code.

Other vulnerabilities in Sonicwall Sonicos

• CVE-2020-5135 SonicWall SonicOS Buffer Overflow Exploited Critical 9.8
• CVE-2024-40766 SonicWall SonicOS Improper Access Control Exploited Critical 9.3
• CVE-2024-53704 SonicWall SonicOS SSLVPN Improper Authentication Exploited High 8.2
• CVE-2025-40600 Denial of service in SonicOS Critical 9.8
• CVE-2024-22394 Auth bypass in SonicOS Critical 9.8

All Sonicwall Sonicos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wr86-4777-gmq8.