CVE-2021-20026

Name: CVE-2021-20026
Creator: NVD / NIST
Published: 2021-05-27T19:15:08.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 11.64%

Last modified Jun 17, 2026

CVE-2021-20026 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability in the SonicWall NSM On-Prem product allows an authenticated attacker to perform OS command injection using a crafted HTTP request. This vulnerability affects NSM On-Prem 2.2.0-R10 and earlier versions.. EPSS estimates a 11.64% chance of exploitation in the next 30 days.

Description

A vulnerability in the SonicWall NSM On-Prem product allows an authenticated attacker to perform OS command injection using a crafted HTTP request. This vulnerability affects NSM On-Prem 2.2.0-R10 and earlier versions.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

11.64%

95.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sonicwall	Network Security Manager	< 2.2.0
Sonicwall	Network Security Manager	2.2.0

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0014Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0014Vendor Advisory

Timeline

Published: May 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20026?

How severe is CVE-2021-20026?

CVE-2021-20026 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 11.64% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20026?

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-2021-20026?

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

Scan your code now

Source: NVD / NIST