Forwarded from Taiwan Computer Network Crisis Management and Coordination Center: Cybersecurity Alert TWCERTCC-200-202602-00000014
[Content Description]
Cisco Catalyst SD-WAN is Cisco's cloud-centric software-defined wide area network (WAN) architecture, providing centralized management, security encryption, and application performance optimization to ensure reliable connectivity in multi-cloud environments. Cisco recently released a major cybersecurity advisory.
【CVE-2026-20127, CVSS: 10.0】This vulnerability exists in the Cisco Catalyst SD-WAN Controller (formerly vSmart) and could be exploited by an unauthenticated remote attacker to bypass authentication mechanisms and gain administrative privileges on the affected system.
【CVE-2026-20126, CVSS: 8.8】This vulnerability exists in Cisco Catalyst SD-WAN Manager (formerly vManage) and could allow an authenticated attacker with low-privilege local access to gain root privileges on the underlying operating system by sending a request via the REST API.
【CVE-2026-20129, CVSS: 9.8】This vulnerability exists in the API user authentication of Cisco Catalyst SD-WAN Manager and could allow an unauthenticated remote attacker to access the affected system as the netadmin user using a carefully crafted API request. Note: Cisco Catalyst SD-WAN Controller (formerly vSmart) and Cisco Catalyst SD-WAN Manager (formerly vManage) have been found to be actively exploited in attack campaigns. Please take immediate action.
[Affected Platforms]
【CVE-2026-20127】
Cisco Catalyst SD-WAN version 20.9, Cisco Catalyst SD-WAN version 20.11, Cisco Catalyst SD-WAN version 20.12.5, Cisco Catalyst SD-WAN version 20.12.6, Cisco Catalyst SD-WAN version 20.13, Cisco Catalyst SD-WAN version 20.14, Cisco Catalyst SD-WAN version 20.15, Cisco Catalyst SD-WAN version 20.16, Cisco Catalyst SD-WAN version 20.18
【CVE-2026-20126, CVE-2026-20129】
Cisco Catalyst SD-WAN Manager version 20.9, Cisco Catalyst SD-WAN Manager version 20.11, Cisco Cisco Catalyst SD-WAN Manager versions 20.12.5, 20.126, 20.13, 20.14, 20.15, 20.16, and 20.18 are compatible with:
[Recommended Action]
Please update to the following versions:
【CVE-2026-20127】
Cisco Catalyst SD-WAN version 20.9.8.2 and later
Cisco Catalyst SD-WAN version 20.12.6.1 and later
Cisco Catalyst SD-WAN version 20.12.5.3 and later
Cisco Catalyst SD-WAN version 20.12.6.1 and later
Cisco Catalyst SD-WAN version 20.15.4.2 and later
Cisco Catalyst SD-WAN version 20.18.2.1 and later
[CVE-2026-20126, CVE-2026-20129]
Cisco Catalyst SD-WAN Manager version 20.9.8.2 and later
Cisco Catalyst SD-WAN Manager version 20.12.6.1 and later
Cisco Catalyst SD-WAN Manager version 20.12.5.3 and later
Cisco Catalyst SD-WAN Manager version 20.12.6.1 and later
Cisco Catalyst SD-WAN Manager Versions 20.15.4.2 and later
Cisco Catalyst SD-WAN Manager versions 20.15.4.2 and later
Cisco Catalyst SD-WAN Manager versions 20.18.2.1 and later
[References]
1. https://www.twcert.org.tw/tw/cp-169-10737-2a2d2-1.html