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CVE-2020-3161

CISA KEV

Published November 3, 2021 · Updated April 3, 2026

high
Official Description+

Cisco IP Phones contain an improper input validation vulnerability for HTTP requests. Exploitation could allow an attacker to execute code remotely with root privileges or cause a denial-of-service (DoS) condition.

Affected Products

VendorProduct
CiscoCisco IP Phones

Patch Status

Patch by 2022-05-03

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-2020-3161.