CISCO Security Advisory
Published Date: Not specified
CVE: CVE-2026-20350
Advisory Summary
â—† Cisco ThousandEyes Virtual Appliance Authenticated Web RCE Risk (Command Injection)
- Cisco disclosed a command injection vulnerability in the web-based management interface of Cisco ThousandEyes Virtual Appliance.
- A remote attacker who is authenticated (requires valid administrative credentials) could inject arbitrary OS commands by abusing improper validation of user-supplied input.
- Successful exploitation may execute commands with root privileges—a high-impact escalation if admin access is obtained.
- Requires administrative credentials (so the realistic risk often follows:
- credential theft/phishing,
- compromised admin accounts,
- weak credential management,
- session hijacking/misconfiguration leading to admin access).
- Exploitation is described via saving configuration content containing malicious values.
- Impact Rating: Medium
- Threat model note: While the rating is “Medium,” the ability to run root-level OS commands can be catastrophic in practice if an attacker reaches an admin session.
- Software updates are released to address the issue.
- No workaround is available per Cisco.
- restrict admin interface exposure (IP allowlists, VPN/zero-trust),
- enforce MFA for all administrative accounts,
- disable/limit any unnecessary admin roles and services.
- rotate credentials that may be exposed,
- review auth logs for anomalous admin logins/config-save activity,
- monitor for unexpected command execution patterns (where telemetry exists).
- if admin credentials were ever suspected compromised, treat as potential post-compromise RCE until proven otherwise.
- CVE: CVE-2026-20350
-2026-20350
Reference: Vendor Advisory