RCE in Cisco Unified Communications Manager
CVE-2026-20045
A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), C…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.039 (88.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Cisco Unified Communications Manager — versions 12.5(1)SU2, 12.5(1)SU1, 12.5(1)
- Cisco Unified Communications Manager Im And Presence Service — versions 12.5(1), 12.5(1)SU1, 12.5(1)SU2
- Cisco Unity Connection — versions 12.5(1), 12.5(1)SU1, 12.5(1)SU2
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
References
Frequently asked questions
- What is CVE-2026-20045?
- CVE-2026-20045 is a high-severity vulnerability in Cisco Unified Communications Manager, classified under Code Injection. CVSS score: 8.2/10. Published 2026-01-21.
- How severe is CVE-2026-20045?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2026-20045 known to be exploited?
- Yes. CVE-2026-20045 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-01-21), indicating it is being actively exploited.