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critical advisory

Cisco Catalyst SD-WAN Manager Multiple Vulnerabilities

Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager could allow a remote attacker to gain access to sensitive information, elevate privileges, or gain unauthorized access to the application.

Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, is affected by multiple vulnerabilities that could lead to sensitive information disclosure, privilege escalation, or unauthorized application access. These vulnerabilities are identified as CVE-2026-20209, CVE-2026-20210, and CVE-2026-20224. Cisco has released software updates to address these issues and recommends immediate upgrades. These vulnerabilities pose a significant risk to organizations relying on Cisco Catalyst SD-WAN Manager for network management, potentially allowing attackers to compromise the confidentiality, integrity, and availability of the SD-WAN infrastructure. There are no known workarounds; patching is the only remediation.

Attack Chain

  1. The attacker identifies a vulnerable Cisco Catalyst SD-WAN Manager instance.
  2. The attacker exploits CVE-2026-20209 to gain unauthorized access. This might involve sending a crafted request to a specific endpoint.
  3. Upon gaining initial access, the attacker leverages CVE-2026-20210 to escalate privileges within the application.
  4. With elevated privileges, the attacker exploits CVE-2026-20224 to access sensitive information stored within the SD-WAN Manager.
  5. The attacker uses the disclosed information to further compromise the SD-WAN environment.
  6. The attacker gains complete control over the SD-WAN Manager, potentially disrupting network operations.

Impact

Successful exploitation of these vulnerabilities could allow a remote attacker to gain unauthorized access to sensitive information, elevate privileges, or gain unauthorized access to the application. This could lead to a complete compromise of the SD-WAN infrastructure, potentially affecting numerous organizations relying on the affected Cisco product for network management. The vulnerabilities are rated as critical by Cisco.

Recommendation

  • Apply the software updates provided by Cisco to address CVE-2026-20209, CVE-2026-20210, and CVE-2026-20224 on all affected Catalyst SD-WAN Manager instances.
  • Deploy the Sigma rules provided below to your SIEM to detect potential exploitation attempts targeting these vulnerabilities.
  • Monitor network traffic for suspicious activity related to Cisco Catalyst SD-WAN Manager, focusing on unusual access patterns and data exfiltration attempts.

Detection coverage 2

Detect CVE-2026-20209 and CVE-2026-20210 Exploitation Attempt - Suspicious URI Access

high

Detects potential exploitation attempts of CVE-2026-20209 and CVE-2026-20210 by monitoring for suspicious URI access patterns.

sigma tactics: initial_access, privilege_escalation sources: webserver

Detect CVE-2026-20224 Exploitation Attempt - Unauthorized API Access

medium

Detects potential exploitation attempts of CVE-2026-20224 by monitoring for unauthorized API access.

sigma tactics: initial_access sources: webserver

Detection queries are available on the platform. Get full rules →