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CVE-2020-5135

CISA KEV

Published March 15, 2022 · Updated April 3, 2026

high
Official Description+

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall.

Affected Products

VendorProduct
SonicWallSonicOS

Patch Status

Patch by 2022-04-05

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-2020-5135.