CVE-2026-20357
10.0Cisco · Crosswork Planning
A missing authentication vulnerability in Cisco Crosswork Planning allows unauthenticated remote attackers to execute critical functions.
Executive summary
Cisco Crosswork Planning is vulnerable to an unauthenticated critical function access flaw, posing a severe risk of total system compromise.
Vulnerability
This vulnerability involves missing authentication for critical functions (CWE-306). The flaw allows an unauthenticated, remote attacker to interact with sensitive system components without providing valid credentials.
Business impact
The CVSS score of 10.0 reflects the highest level of severity, indicating that this vulnerability could lead to a complete takeover of the affected system. Successful exploitation would result in unauthorized access, potential data exfiltration, and full operational disruption, causing significant reputational and financial damage.
Remediation
Immediate Action: Update Cisco Crosswork Planning to the latest version as specified in the vendor security advisory.
Proactive Monitoring: Review system access logs for unusual administrative activity or requests originating from unauthorized network segments.
Compensating Controls: Implement strict network segmentation and restrict access to the management interface of the application to trusted IP addresses only.
Exploitation status
Public Exploit Available: Unknown
Analyst recommendation
Given the critical CVSS severity rating, organizations must prioritize patching this vulnerability immediately. Failure to apply the necessary updates exposes the environment to unauthenticated remote code execution and total system takeover.