CISCO Security Advisory
Published Date: June 12, 2026
CVE: CVE-2026-20245
Advisory Summary
▶️ Critical Privilege Escalation Vulnerability Discovered in Cisco Catalyst SD-WAN Suite
Cisco has identified a high-severity vulnerability (CVE-2026-20245) impacting key components of its Catalyst SD-WAN infrastructure — specifically the SD-WAN Controller (formerly vSmart), SD-WAN Manager (formerly vManage), and SD-WAN Validator (formerly vBond). This flaw resides in the command-line interface (CLI) due to insufficient validation of user-supplied input.
An authenticated local attacker with netadmin privileges can exploit this vulnerability by uploading a specially crafted file, enabling arbitrary command execution with root-level privileges. Notably, obtaining these privileges requires valid credentials or prior exploitation of related vulnerabilities (CVE-2026-20182 or CVE-2026-20127).
Cisco has seen limited instances where such exploitation caused unauthorized configuration changes pushed to edge devices, escalating the operational risk within affected SD-WAN deployments.
⚠️ Key Recommendations for IT and Security Teams:
- Prior to upgrading, execute the request admin-tech command on all SD-WAN control components to collect critical diagnostic data and potential Indicators of Compromise (IoCs).
- Retain and thoroughly review system logs before and after the upgrade to detect any signs of compromise.
- If compromise indicators are detected, realize that patching alone will not suffice; Cisco TAC must be engaged for targeted remediation assistance.
🚫 There are no alternative workarounds; prompt patch application is essential to maintain secure SD-WAN operations.
This vulnerability underscores the importance of continuous monitoring and fast patch deployment within SD-WAN environments to safeguard network integrity and prevent privilege escalations that could lead to significant disruptions or unauthorized access.
-WAN -2026-20245
Reference: Vendor Advisory