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CVE-2026-20034— Cisco Unity Connection Remote Code Execution Vulnerability

CVSS 8.8 · High EPSS 0.45% · P64

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 21

VendorProductVersion RangeStatus
CiscoCisco Unity Connection12.5(1)affected
12.5(1)SU1affected
12.5(1)SU2affected
12.5(1)SU3affected
12.5(1)SU4affected
14affected
12.5(1)SU5affected
14SU1affected
… +13 more rows
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I. Basic Information for CVE-2026-20034

Vulnerability Information
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Vulnerability Title
Cisco Unity Connection Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
路径遍历：’…/…//’
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Unity Connection（UC） 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Unity Connection（UC）是美国思科（Cisco）公司的一套语音留言平台。该平台可利用语音命令，以免提方式拨打电话或收听留言。 Cisco Unity Connection（UC）存在安全漏洞，该漏洞源于用户输入验证不足，可能导致经过身份验证的远程攻击者通过提交特制API请求执行任意代码。
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 Unity Connection 12.5(1) -

II. Public POCs for CVE-2026-20034

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III. Intelligence Information for CVE-2026-20034

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Advisory · 1

Same Patch Batch · Cisco · 2026-05-06 · 12 CVEs total

CVE-2026-201857.7 HIGHCisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability
CVE-2026-201677.7 HIGHCisco IoT Field Network Director Remote Device Denial of Service Vulnerability
CVE-2026-200357.2 HIGHCisco Unity Connection Server-Side Request Forgery Vulnerability
CVE-2026-201686.5 MEDIUMCisco IoT Field Network Director Path Traversal Vulnerability
CVE-2026-201696.4 MEDIUMCisco IoT Field Network Director Command Injection Vulnerability
CVE-2026-202195.4 MEDIUMCisco Slido 安全漏洞
CVE-2026-201955.3 MEDIUMCisco Identity Services Engine Observable Response Discrepancy Vulnerability
CVE-2026-201934.3 MEDIUMCisco Identity Services Engine Authentication Bypass Vulnerability
CVE-2026-201894.3 MEDIUMCisco Prime Infrastructure Information Disclosure Vulnerability
CVE-2026-201724.3 MEDIUMCisco Enterprise Chat and Email Lite Agent File Upload Vulnerability
CVE-2026-20188Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory

IV. Related Vulnerabilities

Same product: Cisco Unity Connection
Same vendor: Cisco
Same weakness: CWE-35

V. Comments for CVE-2026-20034

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