CVE-2022-20789
CVE-2022-20789 is a medium-severity vulnerability in Cisco Unified Communications Manager with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-610.
Key facts
- Severity: Medium (CVSS 3.x base score 4.9)
- CVSS v2: 8.5
- EPSS exploit prediction: 1% (67th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-610
- Affected product: Cisco Unified Communications Manager
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2022-20789?
- CVE-2022-20789 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2022-20789 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-20789?
- CVE-2022-20789 primarily affects Cisco Unified Communications Manager. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2022-20789?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2022-20789 published?
- CVE-2022-20789 was published on 2022-04-21 and last updated on 2026-06-17.
References
Affected products (4)
- cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:-:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:session_management:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:14.0:*:*:*:-:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:14.0:*:*:*:session_management:*:*:*
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