CVE-2026-20045Cisco Unified Communications Products Remote Code Execution Vulnerability
Updated under an hour ago ()
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It affects Cisco Unified Communications Manager and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 21, 2026; federal agencies had to remediate by Feb 11, 2026. Treat that date as your deadline.
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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 of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. Note: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root.
- CVSS
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- Weakness (CWE)
- CWE-94
- Known exploited
- Added to CISA KEV Jan 21, 2026; federal remediation due Feb 11, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 4.54% (percentile 91)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Feb 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cisco Cisco Unified Communications Manager cisco:unified_communications_manager (from the name) | 12.5(1)SU2; 12.5(1)SU1; 12.5(1); 12.5(1)SU3; 12.5(1)SU4; 14; 12.5(1)SU5; 14SU1; and 23 more ranges | CNA record |
Cisco Cisco Unified Communications Manager IM and Presence Service cisco:unified_communications_manager_im_and_presence_service (from the name) | 12.5(1); 12.5(1)SU1; 12.5(1)SU2; 12.5(1)SU3; 12.5(1)SU4; 14; 12.5(1)SU5; 14SU1; and 12 more ranges | CNA record |
Cisco Cisco Unity Connection cisco:unity_connection (from the name) | 12.5(1); 12.5(1)SU1; 12.5(1)SU2; 12.5(1)SU3; 12.5(1)SU4; 14; 12.5(1)SU5; 14SU1; and 13 more ranges | CNA record |
cisco unified_communications_manager cisco:unified_communications_manager | from 12.5 before 14su5; from 12.5 before 14su5; from 15.0 through 15su3a; from 15.0 through 15su3a | NVD |
cisco unified_communications_manager_im_and_presence_service cisco:unified_communications_manager_im_and_presence_service | from 12.5 before 14su5; from 15.0 through 15su3a | NVD |
cisco unity_connection cisco:unity_connection | from 12.5 before 14su5; from 15.0 through 15su3 | NVD |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-mORhqY4bvendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20045us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.