CVE-2026-20230

HIGH

Cisco Unified Communications Manager - Server-Side Request Forgery (SSRF)

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-20230. PoCs published by HORKimhab.

AI-analyzed exploit summary The repository contains a scanner for CVE-2026-20230, which targets Cisco Unified CM's WebDialer service. It checks for the presence of vulnerable endpoints and attempts to detect WebDialer functionality but lacks a functional exploit payload.

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.

Exploits (1)

github SCANNER
by HORKimhab · poc
https://github.com/HORKimhab/CVE-2026-20230

The repository contains a scanner for CVE-2026-20230, which targets Cisco Unified CM's WebDialer service. It checks for the presence of vulnerable endpoints and attempts to detect WebDialer functionality but lacks a functional exploit payload.

Classification
Scanner 90%
Attack Type
Ssrf
Complexity
Moderate
Reliability
Theoretical
Target: Cisco Unified CM (versions 14.x, 15.x)
No auth needed
Prerequisites: Network access to the target · WebDialer service enabled
devstral-2 · analyzed Jun 05, 2026 Full analysis →

Scores

CVSS v3 8.6
EPSS 0.0002
EPSS Percentile 6.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-918
Status published
Products (1)
Cisco/Cisco Unified Communications Manager
Published Jun 03, 2026
Tracked Since Jun 03, 2026