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CVE-2026-20230— Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability

CVSS 8.6 · High KEV EPSS 41.69% · P99

Affected Version Matrix 22

VendorProductVersion RangeStatus
CiscoCisco Unified Communications Manager14affected
14SU1affected
14SU2affected
14SU3affected
15affected
15SU1affected
14SU4affected
14SU4aaffected
… +14 more rows
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I. Basic Information for CVE-2026-20230

Vulnerability Information
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Vulnerability Title
Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Unified Communications Manager 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Unified Communications Manager是美国思科（Cisco）公司的一款统一通信系统中的呼叫处理组件。该组件提供了一种可扩展、可分布和高可用的企业IP电话呼叫处理解决方案。 Cisco Unified Communications Manager存在代码问题漏洞，该漏洞源于对特定HTTP请求的输入验证不当，可能导致未经身份验证的远程攻击者进行服务端请求伪造攻击，进而写入文件并提升至root权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
CiscoCisco Unified Communications Manager 14 -

II. Public POCs for CVE-2026-20230

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III. Intelligence Information for CVE-2026-20230

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Vendor Advisories for CVE-2026-20230 (1)

Same Patch Batch · Cisco · 2026-06-03 · 3 CVEs total

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IV. Related Vulnerabilities

Same product: Cisco Unified Communications Manager
Same vendor: Cisco
Same weakness: CWE-918

V. Comments for CVE-2026-20230

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