CVE-2026-20230— Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability
Quick assessment
Affected
Cisco Cisco Unified Communications Manager
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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。
In-the-Wild Activity Observed
cisa_kev · confirmed
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 22
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco Unified Communications Manager | 14 |
affected |
14SU1 |
affected | ||
14SU2 |
affected | ||
14SU3 |
affected | ||
15 |
affected | ||
15SU1 |
affected | ||
14SU4 |
affected | ||
14SU4a |
affected | ||
| … +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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Unified Communications Manager | 14 | - |
|
II. Public POCs for CVE-2026-20230
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-20230 (1)
Same Patch Batch · Cisco · 2026-06-03 · 3 CVEs total
| CVE-2026-20175 | 6.1 MEDIUM | Cisco Finesse File Inclusion Vulnerability |
| CVE-2026-20233 | 6.1 MEDIUM | Cisco Webex Meetings Cross-Site Scripting Vulnerability |
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V. Comments for CVE-2026-20230
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