Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

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• NewsExploited · CISA KEVCisco · Catalyst SD-WAN

  Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

  CVE-2026-20182

  Cisco Catalyst SD-WAN Controller & Manager contain an authentication bypass vulnerability that allows an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.

  CISA's required action · due 17 May 2026 for U.S. federal civilian agencies

  Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlined in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

  Cited by CISA: sec.cloudapps.cisco.com · nvd.nist.gov

  Added to KEV 14 May 2026 · Source checked 4 Nov 2026, 16:35 UTC · CISA KEV entry

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