CVE-2026-20182 - Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

Project:Cisco

Product:Catalyst SD-WAN

Date Added:2026-05-14Due Date:2026-05-17Last Updated:May 14, 2026

Vulnerability Name

Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

Description

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.

Known To Be Used in Ransomware Campaigns?

Unknown

Action

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.

Additional Notes

CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems

https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW

https://nvd.nist.gov/vuln/detail/CVE-2026-20182