Full Report
Cisco has released software updates to address a critical security flaw impacting Meeting Management that could permit a remote, authenticated attacker to gain administrator privileges on susceptible instances. The vulnerability, tracked as CVE-2025-20156, carries a CVSS score of 9.9 out 10.0. It has been described as a privilege escalation flaw in the REST API of Cisco Meeting Management. "This
Analysis Summary
# Vulnerability: Cisco Meeting Management Authenticated Privilege Escalation
## CVE Details
- CVE ID: CVE-2025-20156
- CVSS Score: 9.9 (Critical)
- CWE: Missing Authorization (Implied by description)
## Affected Systems
- Products: Cisco Meeting Management
- Versions: Release version 3.9, Release versions 3.8 and earlier
- Configurations: Affects all configurations, requires authentication to the REST API.
## Vulnerability Description
This critical vulnerability exists in the REST API of Cisco Meeting Management due to a failure to enforce proper authorization checks for API users. A remote, authenticated attacker can exploit this by sending specially crafted API requests to a specific endpoint, leading to the successful escalation of privileges to administrator-level control over managed edge nodes.
## Exploitation
- Status: Not explicitly stated, but treated as a high-risk issue requiring immediate patching.
- Complexity: Not specified, but the requirement for authentication suggests Medium complexity.
- Attack Vector: Network (via API requests)
## Impact
- Confidentiality: High (Potential unauthorized access to sensitive control data)
- Integrity: High (Potential control over edge nodes)
- Availability: Not directly implied, but high privilege compromise could affect service availability.
## Remediation
### Patches
- Cisco Meeting Management release version 3.9: Fixed in **3.9.1**.
- Cisco Meeting Management release versions 3.8 and earlier: **Migrate to a fixed release.**
- Cisco Meeting Management release version 3.10: Not vulnerable.
### Workarounds
- No specific workarounds were detailed, but restricting access to the REST API endpoints or requiring stronger authentication mechanisms might serve as temporary measures until patching can be applied.
## Detection
- **Indicators of compromise:** Look for API requests containing unusual or unauthorized operations directed at sensitive REST API endpoints following an initial successful login attempt.
- **Detection methods and tools:** Monitoring network traffic and API access logs for suspicious authenticated activity should be prioritized.
## References
- Vendor advisories: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cmm-privesc-uy2Vf8pc
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*Note: The article also detailed CVE-2025-20165 (BroadWorks DoS) and CVE-2025-20128 (ClamAV DoS), and discussed Ivanti vulnerabilities (CVE-2024-8963, CVE-2024-9379, CVE-2024-8190, CVE-2024-9380), which were excluded from the focus summary targeting a single vulnerability description.*