EN

CVE-2025-20156

Critical
9.9
0.05.010.0
Year
2025
Published
Jan 22, 2025
Known Affected Devices
0
CVSS Score
9.9

What is CVE-2025-20156?

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.

CVSS Vector Breakdown

CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
AV
Attack Vector
Network

Exploitable remotely over the network without requiring access to the local system.

AC
Attack Complexity
Low

No special conditions required. Exploit can be performed reliably and repeatedly.

PR
Privileges Required
Low

Basic user account required (e.g. standard login without admin rights).

UI
User Interaction
None

No user interaction required. Exploit runs without any victim action.

S
Scope
Changed

Exploiting the vulnerability can affect other components beyond the vulnerable one.

C
Confidentiality Impact
High

Complete loss of confidentiality. All data on the component may be exposed.

I
Integrity Impact
High

Complete loss of integrity. Attacker can modify any file or data on the component.

A
Availability Impact
High

Complete denial of service. The component becomes fully unavailable.

Known Affected Devices

Cisco Cisco ISR 931 Cisco Cisco Catalyst 2960S-48TS-L Cisco Cisco Catalyst 2960X-48FPS-L Cisco Cisco Catalyst 2960XR-24TS-I Cisco Cisco Catalyst 3650-24PS-L Cisco Cisco Catalyst 3650-48TS-L Cisco Cisco Catalyst 3750X-24P-S Cisco Cisco Catalyst 9200-24P Cisco Cisco Catalyst 9200-24T Cisco Cisco Catalyst 9200-48T Cisco Cisco Catalyst 9200L-24P-4G Cisco Cisco Catalyst 9200L-24P-4X Cisco Cisco Catalyst 9300-48T Cisco Cisco Catalyst 9404R Cisco Cisco Aironet 1815M Cisco Cisco Aironet 3802I Cisco Cisco Catalyst 9120AXI Cisco Cisco Catalyst 9130AXI

FAQ

How severe is CVE-2025-20156?

CVE-2025-20156 has a CVSS score of 9.9/10, rated as Critical. This is the highest severity level - immediate patching is strongly recommended.

What does the CVSS score mean for CVE-2025-20156?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2025-20156 scores 9.9/10 (Critical). Scores 9.0–10.0 are Critical, 7.0–8.9 are High, 4.0–6.9 are Medium, and below 4.0 are Low.

Which devices are affected by CVE-2025-20156?

The list of devices confirmed to be affected by CVE-2025-20156 is shown in the "Affected Devices" section above. Check your firmware version against the vendor security advisory and apply the latest patch.

How do I fix or mitigate CVE-2025-20156?

Apply the latest firmware or software update from the vendor. Check the References section above for official advisories and patch notes. If no patch is available, consider disabling the affected feature or isolating the device from untrusted networks.