CVE-2022-20789

6.5 mediumEPSS 1.4%

Medium (6.5) in cisco unified communications manager. EPSS 1.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWEs: CWE-610, CWE-73
Published: 2022-04-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

cisco:unified_communications_manager

References

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