Cisco Meeting Management: Improper Handling of Insufficient Privileges
CVE-2025-20156 is a critical-severity improper handling of insufficient privileges vulnerability in Cisco Meeting Management from Cisco, with a CVSS 3.1 base score of 9.9 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected Cisco Meeting Management versions: CMM3.4.0; CMM3.2.0; CMM2.9.1, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.19% chance of exploitation within 30 days, higher than 68% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Meeting Management to 3.9.1 or a later version.
- Read the advisory on sec.cloudapps.cisco.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Cisco | Cisco Meeting Management | CMM3.4.0; CMM3.2.0; CMM2.9.1; CMM2.9.0; CMM3.1.0; CMM3.5.0; CMM3.6.0; CMM3.6.1; and 3 more ranges | Not stated |
| Cisco | Meeting Management | before 3.9.1 | 3.9.1 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (cisco.com).
Official description
A vulnerability in the REST API of Cisco Meeting Management could allow a remote, authenticated attacker with low privileges to elevate privileges to administrator on an affected device. This vulnerability exists because proper authorization is not enforced upon REST API users. An attacker could exploit this vulnerability by sending API requests to a specific endpoint. A successful exploit could allow the attacker to gain administrator-level control over edge nodes that are managed by Cisco Meeting Management.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Handling of Insufficient Privileges
The product does not handle or incorrectly handles when it has insufficient privileges to perform an operation.
More Improper Handling of Insufficient Privileges vulnerabilities (CWE-274)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other references
Other vulnerabilities in Cisco Meeting Management
- 8.8 High severity
Recent Improper Handling of Insufficient Privileges vulnerabilities
- 8.7 High severity
- 8.9 High severity
- 7.2 High severity
- 8.8 High severity
- 8.8 High severity
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