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CVE-2021-20038

CISA KEV

Published January 28, 2022 · Updated April 3, 2026

high
Official Description+

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

Affected Products

VendorProduct
SonicWallSMA 100 Appliances

Patch Status

Patch by 2022-02-11

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2021-20038.