Risk Letters

Exploited vulnerability

CVE-2026-20045

TLP:CLEAR

Cisco Unified Communications Products Code Injection Vulnerability

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 contain a code injection vulnerability that could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root.

Facts

  • Vendor: Cisco
  • Product: Unified Communications Manager
  • CVSS: 8.2
  • EPSS (probability of exploitation within 30 days): 4.5 %
  • On CISA's Known Exploited Vulnerabilities list since: 21 January 2026
  • First known exploitation: 21 January 2026
  • CISA's deadline for US federal agencies: 11 February 2026
  • Weakness: CWE-94
  • First seen by Risk Letters: 21 January 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD