Cisco Unified Communications Manager (CUCM): Schwachstelle ermöglicht Manipulation von Dateien

Weakness-Klassen (CWE)

• CWE-918Base

  Server-Side Request Forgery (SSRF)

  The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

  cwe.mitre.org →

Re-Analyse & Statuswechsel

Chronologie der NVD-Audit-Events für diese CVE — Reanalyses, CVSS-Updates, CPE-Diffs.

1. CVE Translated2026-07-22 19:10 UTC· nvd@nist.gov
   • Translation: Title: Cisco Unified Communications Manager de Cisco, Description: Una vulnerabilidad en Cisco Unified Communications Manager (Unified CM) y Cisco Unified Communications Manager Session Management Edition (Unified CM SME) podría permitir a un atacante remoto no autenticado realizar ataques de falsificación de petición del lado del servidor (SSRF) a través de un dispositivo afectado. Esta vulnerabilidad se debe a una validación de entrada incorrecta para peticiones HTTP específicas. Un atacante podría explotar esta vulnerabilidad enviando una petición HTTP manipulada a un dispositivo afectado. Un exploit exitoso podría permitir al atacante escribir archivos en el sistema operativo subyacente que podrían usarse más tarde para elevar a root. Nota: Cisco ha asignado a este aviso de seguridad una Calificación de Impacto de Seguridad (SIR) de Crítica en lugar de Alta, como indica la puntuación. La razón es que la explotación de esta vulnerabilidad podría resultar en que un atacante eleve privilegios a root. Nota: Para explotar esta vulnerabilidad, el servicio WebDialer debe estar habilitado. WebDialer está deshabilitado por defecto.
2. Modified Analysis2026-07-01 18:15 UTC· nvd@nist.gov
3. CVE Modified2026-07-01 17:16 UTC· psirt@cisco.com
   • Affected: Cisco Unified Communications Manager → Cisco Unified Communications Manager
   • Description: A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate 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. Note: To exploit this vulnerability, the WebDialer service must be enabled. WebDialer is disabled by default. → A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate 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. Note: To exploit this vulnerability, the WebDialer service must be enabled. WebDialer is disabled by default.
4. CVE Modified2026-06-24 17:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
   • Reference: https://denizhalil.com/2026/06/12/cve-2026-20230-cisco-unified-cm-ssrf/
   • SSVC: {"id":"CVE-2026-20230","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI… → {"id":"CVE-2026-20230","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalIm…

Beschreibung

Öffentliche Exploit-Referenzen

Öffentliche Proof-of-Concepts und Detection-Templates für diese Schwachstelle. Die Reife reicht von gemeldeten PoCs über funktionsfähige Detection-Skripte bis hin zu vollständig waffenfähigen Exploit-Modulen. NEOSEC mirrort den Code intern für forensische Analysen; nach außen verlinken wir ausschließlich auf die Original-Quellen.

• CISA KEV Catalogaktiv ausgenutzt (KEV)
  CISA Known Exploited Vulnerabilityhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog#CVE-2026-202302026-06-25 00:00 UTC

Quellen & Referenzen

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssrf-cXPnHcW

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