CVE-2020-5129

Name: CVE-2020-5129
Creator: NVD / NIST
Published: 2020-03-26T13:15:13.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.30%

Last modified Jun 17, 2026

CVE-2020-5129 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the SonicWall SMA1000 HTTP Extraweb server allows an unauthenticated remote attacker to cause HTTP server crash which leads to Denial of Service. This vulnerability affected SMA1000 Version 12.1.0-06411 and earlier.. EPSS estimates a 1.30% chance of exploitation in the next 30 days.

Description

A vulnerability in the SonicWall SMA1000 HTTP Extraweb server allows an unauthenticated remote attacker to cause HTTP server crash which leads to Denial of Service. This vulnerability affected SMA1000 Version 12.1.0-06411 and earlier.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.30%

66.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sonicwall	Sma1000 Firmware	<= 12.1.0-06411

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0002Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0002Vendor Advisory

Timeline

Published: Mar 26, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5129?

How severe is CVE-2020-5129?

CVE-2020-5129 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.30% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5129?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5129?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST