CVE-2022-20789: medium-severity vulnerability in Cisco Unified Communications Manager
Cisco Unified Communications Products Arbitrary File Write Vulnerability
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.9epss 1.4%
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Affected products
Cisco · Cisco Unified Communications ManagerRelated CVEs — Cisco Unified Communications Manager
In the same product, most dangerous first.
CVE-2026-20230HIGHCisco Unified Communications Manager Server-Side Request Forgery VulnerabilityEPSS 88.5%KEVCVE-2026-20045HIGHCisco Unified Communications Products Remote Code Execution VulnerabilityEPSS 4.5%KEVCVE-2020-3177HIGHCisco Unified Communications Manager Path Traversal VulnerabilityEPSS 2.8%CVE-2019-1837MEDIUMCisco Unified Communications Manager Denial of Service VulnerabilityEPSS 2.4%CVE-2024-20253CRITICALCVE-2024-20253EPSS 2.4%CVE-2022-20790MEDIUMCisco Unified Communications Products Arbitrary File Read VulnerabilityEPSS 1.9%