CVE-2026-20034— Cisco Unity Connection Remote Code Execution Vulnerability
Quick assessment
Affected
Cisco Cisco Unity Connection
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 21
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco Unity Connection | 12.5(1) |
affected |
12.5(1)SU1 |
affected | ||
12.5(1)SU2 |
affected | ||
12.5(1)SU3 |
affected | ||
12.5(1)SU4 |
affected | ||
14 |
affected | ||
12.5(1)SU5 |
affected | ||
14SU1 |
affected | ||
| … +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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
路径遍历：’…/…//’
Source: CVE Program / CVE List V5
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Unity Connection | 12.5(1) | - |
|
II. Public POCs for CVE-2026-20034
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-20034 (1)
Same Patch Batch · Cisco · 2026-05-06 · 12 CVEs total
| CVE-2026-20185 | 7.7 HIGH | Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability |
| CVE-2026-20167 | 7.7 HIGH | Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability |
| CVE-2026-20035 | 7.2 HIGH | Cisco Unity Connection Server-Side Request Forgery Vulnerability |
| CVE-2026-20168 | 6.5 MEDIUM | Cisco IoT Field Network Director Path Traversal Vulnerability |
| CVE-2026-20169 | 6.4 MEDIUM | Cisco IoT Field Network Director Command Injection Vulnerability |
| CVE-2026-20219 | 5.4 MEDIUM | Cisco Slido 安全漏洞 |
| CVE-2026-20195 | 5.3 MEDIUM | Cisco Identity Services Engine Observable Response Discrepancy Vulnerability |
| CVE-2026-20193 | 4.3 MEDIUM | Cisco Identity Services Engine Authentication Bypass Vulnerability |
| CVE-2026-20189 | 4.3 MEDIUM | Cisco Prime Infrastructure Information Disclosure Vulnerability |
| CVE-2026-20172 | 4.3 MEDIUM | Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability |
| CVE-2026-20188 | Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory |
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Same product: Cisco Unity Connection
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V. Comments for CVE-2026-20034
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