CVE-2026-20045

HIGH CISA KEV Actively Exploited

Cisco Unified Communications Products Remote Code Execution Vulnerability

CVSS v3

8.2

HIGH

EPSS Score

4.1%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

active

SSVC status

Description

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), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device.  This vulnerability is due to improper validation o

CISA Known Exploited Vulnerability

Date Added: 1/21/2026
Patch Due Date: 2/11/2026
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.

Technical Details

CVSS v3 Vector: 3.1
Published: 1/21/2026
Last Modified: 2/13/2026

Frequently Asked Questions

What is CVE-2026-20045?

Is CVE-2026-20045 actively exploited?

Yes. CVE-2026-20045 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2/11/2026.

What is the CVSS score for CVE-2026-20045?

CVE-2026-20045 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string 3.1.

Is CVE-2026-20045 affecting your environment?

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