Privilege escalation in Cisco Unified Communications Products

Published: 2023-08-31
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-20266
Exploitation vector Network
Public exploit N/A
Vulnerable software
Cisco Emergency Responder
Other software / Other software solutions

Cisco Unified Communications Manager
Server applications / Other server solutions

Cisco Unified Communications Manager Session Management Edition
Server applications / Remote management servers, RDP, SSH

Cisco Unity Connection
Client/Desktop applications / Messaging software

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU80178

Risk: Low


CVE-ID: CVE-2023-20266


Exploit availability:


The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to the affected application does not properly restrict the files that are being used for upgrades. A remote administrator can use a specially crafted upgrade file and elevate privileges to root.


Install updates from vendor's website.

Vulnerable software versions

Cisco Emergency Responder: 12.5.1SU4 - 14SU3

Cisco Unified Communications Manager: 12.5.1SU8

Cisco Unified Communications Manager Session Management Edition: 12.5.1SU8

Cisco Unity Connection: 12.5.1SU6 - 14SU3

Fixed software versions

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?