What is CVE-2022-20789?

CVE-2022-20789 is a medium-severity vulnerability in Cisco Unified Communications Manager, classified under External Control of File Name or Path. CVSS score: 4.9/10. Published 2022-04-21.

How severe is CVE-2022-20789?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in Cisco Unified Communications Manager

CVE-2022-20789

A vulnerability in the software upgrade process of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to write arbitrary files on the affected system. This vulnerability is due to improper restrictions applied to a system script. An attacker could exploit this vulnerability by using crafted variables during the execution of a system upgrade. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges.

EPSS: 0.013 (68.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

Affected products

Cisco Unified Communications Manager — versions n/a
Cisco Unified_communications_manager — versions 12.5\(1\), 14.0

Weakness classification (CWE)

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2022-20789?: CVE-2022-20789 is a medium-severity vulnerability in Cisco Unified Communications Manager, classified under External Control of File Name or Path. CVSS score: 4.9/10. Published 2022-04-21.
How severe is CVE-2022-20789?: Medium severity. CVSS v3 base score is 4.9 out of 10.