Cisco SD-WAN auth bypass exploited globally
CISA confirms active exploitation of CVE-2026-20127 and CVE-2022-20775 in Cisco Catalyst SD-WAN systems worldwide, enabling attackers to bypass authentication and gain admin access.
Sourcecisecurity.org — open the original
What to check
- Applies to
- The 7 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2022-20775, CVE-2026-20122, CVE-2026-20127, CVE-2026-20128, and CVE-2026-20133 as exploited in the wild.
Multiple vulnerabilities in Cisco Catalyst SD-WAN products are under active exploitation by malicious cyber actors targeting organizations globally. CISA added CVE-2026-20127 (a previously undisclosed authentication bypass flaw) and CVE-2022-20775 to its Known Exploited Vulnerabilities Catalog on February 25, 2026, after observing attackers chain these vulnerabilities to compromise SD-WAN systems. Attackers exploit CVE-2026-20127 for initial access, then escalate privileges via CVE-2022-20775 to establish persistent access.
The most severe vulnerability (CVE-2026-20127) exists in the peering authentication mechanism of Cisco Catalyst SD-WAN Controller and Manager, allowing unauthenticated remote attackers to bypass authentication and obtain administrative privileges. Successfully exploited, attackers can log in as a high-privileged internal user, access NETCONF, and manipulate network configuration for the entire SD-WAN fabric. Additional vulnerabilities in the advisory include API authentication bypass (CVE-2026-20129), privilege escalation flaws, arbitrary file overwrites, and information disclosure issues.
Affected systems span multiple versions of Cisco Catalyst SD-WAN Manager and SD-WAN products, with several versions reaching end-of-life status. Patches are available or releasing imminently for supported versions. Organizations running affected systems should apply updates immediately, implement network segmentation to isolate SD-WAN infrastructure, and conduct thorough reviews for indicators of compromise given the confirmed active exploitation.
Mentioned in this report
Source reporting: https://www.cisecurity.org/advisory/multiple-vulnerabilities-in-cisco-catalyst-sd-wan-products-could-allow-for-authentication-bypass_2026-016
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