CVE-2021-20038

SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code…

Browse: All 2021 CVEs · All vendors

CISA KEV
Yes — actively exploited (added 2022-01-28, remediation due 2022-02-11)
Ransomware
Known ransomware campaign use
Weakness (CWE)
CWE-121

Description

SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution.

Affected products

Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.

Required action (CISA)

Apply updates per vendor instructions. Federal remediation deadline: 2022-02-11.

How to prioritize this

This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score.

FAQ

Is CVE-2021-20038 actively exploited?

Yes. CISA added CVE-2021-20038 to its Known Exploited Vulnerabilities (KEV) catalog on 2022-01-28, with a federal remediation deadline of 2022-02-11. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.

What is the CVSS score of CVE-2021-20038?

CVE-2021-20038 has no published CVSS base score yet — NVD analysis can lag disclosure. Check the vendor references for an interim severity.

Related vulnerabilities

Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.