CVE-2023-20266 - CVE House
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Status published Medium CVE-2023-20266

A vulnerability in Cisco Emergency Responder, Cisco Unified Communications Manager...

Vulnerability Description

A vulnerability in Cisco Emergency Responder, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an authenticated, remote attacker to elevate privileges to root on an affected device. This vulnerability exists because the application does not properly restrict the files that are being used for upgrades. An attacker could exploit this vulnerability by providing a crafted upgrade file. A successful exploit could allow the attacker to elevate privileges to root. To exploit this vulnerability, the attacker must have valid platform administrator credentials on an affected device.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Cisco Emergency Responder, Cisco Unity Connection, Cisco Unified Communications Manager
Vulnerable Versions:
12.5(1)SU4, 12.5(1)SU8a, 14SU3, 12.5(1)SU6, 12.5(1)SU7, 12.5(1)SU8, 14SU2

Timeline

Official Publish: August 30th, 2023
Last Modified: July 1st, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-347

MITRE ATT&CK TTPs

T1553 Subvert Trust Controls
Defense Evasion
T1190 Exploit Public-Facing Application
Initial Access
T1078 Valid Accounts
Persistence
T1550 Use Alternate Authentication Material
Defense Evasion
T1565 Data Manipulation
Impact