Actively exploited in the wild
Cisco Unified Communications Products Code Injection Vulnerability
Cisco - Unified Communications Manager · Listed in the CISA KEV since 2026-01-21. This indicates confirmed attacks in production environments.
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.
CVE-2026-20045
HighCVSS 8.2KEVSummary
Podatność w Cisco Unified Communications Manager oraz powiązanych produktach umożliwia nieautoryzowanemu, zdalnemu atakującemu wykonanie dowolnych poleceń na systemie operacyjnym urządzenia. Problem wynika z niewłaściwej walidacji danych wejściowych w żądaniach HTTP.
Risk Assessment
Atakujący może uzyskać dostęp na poziomie użytkownika do systemu operacyjnego, a następnie podnieść swoje uprawnienia do poziomu root, co stwarza poważne zagrożenie dla bezpieczeństwa organizacji.
Recommendation
Zaleca się natychmiastowe zaktualizowanie oprogramowania do najnowszej wersji oraz wdrożenie odpowiednich środków zabezpieczających, aby ograniczyć dostęp do interfejsu zarządzania.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

