CVE-2026-20182

Vulnerability details

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.

Added to CISA KEV: 2026-05-14

Ransomware campaign use: Unknown

CISA due date: 2026-05-17

Defensive guidance from CISA

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.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.