轉發 台灣電腦網路危機處理暨協調中心 資安訊息警訊 TWCERTCC-200-202602-00000014

[內容說明]
Cisco Catalyst SD-WAN 是 Cisco 以雲端為中心的軟體定義廣域網路架構，提供集中管理、安全加密及應用效能優化，確保多雲環境的可靠連線，近日Cisco發布重大資安公告。

【CVE-2026-20127，CVSS：10.0】 此漏洞存在於Cisco Catalyst SD-WAN Controller(formerly vSmart) 可能被未經身分驗證的遠端攻擊者利用，以繞過身分驗證機制並取得受影響系統的管理權限。

【CVE-2026-20126，CVSS：8.8】 此漏洞存在於Cisco Catalyst SD-WAN Manager(formerly vManage) ，可能允許已通過身分驗證且具有本機低權限的攻擊者，利用REST API發送請求後，取得底層作業系統的root權限。

【CVE-2026-20129，CVSS：9.8】 此漏洞存在於Cisco Catalyst SD-WAN Manager 的 API 使用者驗證，允許未經身分驗證的遠端攻擊者利用精心設計的API請求，以netadmin 角色使用者的身分存取受影響的系統。 註：Cisco Catalyst SD-WAN Controller (formerly vSmart) 與 Cisco Catalyst SD-WAN Manager (formerly vManage) 已被發現積極利用於攻擊活動，請儘速採取應變措施。

[影響平台]
【CVE-2026-20127】
Cisco Catalyst SD-WAN 20.9 版本、 Cisco Catalyst SD-WAN 20.11版本、 Cisco Catalyst SD-WAN 20.12.5版本、 Cisco Catalyst SD-WAN 20.12.6版本、 Cisco Catalyst SD-WAN 20.13版本、 Cisco Catalyst SD-WAN 20.14版本、 Cisco Catalyst SD-WAN 20.15版本、 Cisco Catalyst SD-WAN 20.16版本、 Cisco Catalyst SD-WAN 20.18版本

【CVE-2026-20126、CVE-2026-20129】
Cisco Catalyst SD-WAN Manager 20.9版本、 Cisco Catalyst SD-WAN Manager 20.11版本、 Cisco Catalyst SD-WAN Manager 20.12.5版本、 Cisco Catalyst SD-WAN Manager 20.126版本、 Cisco Catalyst SD-WAN Manager 20.13版本、 Cisco Catalyst SD-WAN Manager 20.14版本、 Cisco Catalyst SD-WAN Manager 20.15版本、 Cisco Catalyst SD-WAN Manager 20.16版本、 Cisco Catalyst SD-WAN Manager 20.18版本

[建議措施]
請更新至以下版本：
【CVE-2026-20127】
Cisco Catalyst SD-WAN 20.9.8.2(含)之後版本
Cisco Catalyst SD-WAN 20.12.6.1(含)之後版本
Cisco Catalyst SD-WAN 20.12.5.3(含)之後版本
Cisco Catalyst SD-WAN 20.12.6.1(含)之後版本
Cisco Catalyst SD-WAN 20.15.4.2(含)之後版本
Cisco Catalyst SD-WAN 20.18.2.1(含)之後版本

【CVE-2026-20126、CVE-2026-20129】
Cisco Catalyst SD-WAN Manager 20.9.8.2(含)之後版本
Cisco Catalyst SD-WAN Manager 20.12.6.1(含)之後版本
Cisco Catalyst SD-WAN Manager 20.12.5.3(含)之後版本
Cisco Catalyst SD-WAN Manager 20.12.6.1(含)之後版本
Cisco Catalyst SD-WAN Manager 20.15.4.2(含)之後版本
Cisco Catalyst SD-WAN Manager 20.15.4.2(含)之後版本
Cisco Catalyst SD-WAN Manager 20.18.2.1(含)之後版本

[參考資料]
1. https://www.twcert.org.tw/tw/cp-169-10737-2a2d2-1.html

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