CVE-2026-20230: Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability | Kitploit

CVE-2026-20230

HighPublished

Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability

Published: Jun 3, 2026
Updated: Jul 1, 2026
Assigning CNA: cisco
Evidence observed: Jun 25, 2026

Primary CVSS

8.6/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

EPSS probability estimate

88.2%

High · next 30 days

Percentile: 99.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

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.

Sources

Cisco-Unified-Communications-Manager-Server-Side-Forgery-Request-Vulnerability-CVE-2026-20230Research
Analyzes CVE-2026-20230 SSRF to arbitrary file write and RCE in Cisco Unified Communications Manager, providing PoC derivation, detection logic, and defensive guidance.
CVE-2026-20230-ScannerScanner

Responsible use

Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.