CVE-2026-20059— Cisco Unity Connection Reflected Cross-Site Scripting 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存在安全漏洞，该漏洞源于基于Web的管理界面输入验证不当，可能导致未经验证的远程攻击者执行反射型跨站脚本攻击。
Possible ATT&CK Techniques 3 AI
T1005 · Data from Local System T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-20059
Vulnerability Information
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Vulnerability Title
Cisco Unity Connection Reflected Cross-Site Scripting Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the web-based management interface of Cisco Unity Connection could allow an unauthenticated, remote attacker to conduct a reflected XSS attack against a user of the interface.
This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
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存在安全漏洞，该漏洞源于基于Web的管理界面输入验证不当，可能导致未经验证的远程攻击者执行反射型跨站脚本攻击。
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 | 14 | - |
|
II. Public POCs for CVE-2026-20059
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-20059 (1)
Same Patch Batch · Cisco · 2026-04-15 · 15 CVEs total
| CVE-2026-20147 | 9.9 CRITICAL | Cisco Identity Services Engine Remote Code Execution Vulnerability |
| CVE-2026-20186 | 9.9 CRITICAL | Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability |
| CVE-2026-20180 | 9.9 CRITICAL | Cisco Identity Services Engine Multiple Remote Code Execution Vulnerability |
| CVE-2026-20184 | 9.8 CRITICAL | Cisco Webex Meetings Certificate Validation Vulnerability |
| CVE-2026-20078 | 6.5 MEDIUM | Cisco Unity Connection Arbitrary File Download Vulnerability |
| CVE-2026-20081 | 6.5 MEDIUM | Cisco Unity Connection Arbitrary File Download Vulnerability |
| CVE-2026-20170 | 6.1 MEDIUM | Cisco Webex Contact Center 安全漏洞 |
| CVE-2026-20136 | 6.0 MEDIUM | Cisco Identity Services Engine Authenticated Privilege Escalation Vulnerability |
| CVE-2026-20161 | 5.5 MEDIUM | Cisco ThousandEyes Enterprise Agent Arbitrary File Overwrite Vulnerability |
| CVE-2026-20152 | 5.3 MEDIUM | Cisco Secure Web Appliance Authentication Service Traffic Bypass Vulnerability |
| CVE-2026-20148 | 4.9 MEDIUM | Cisco Identity Services Engine Path Traversal Vulnerability |
| CVE-2026-20132 | 4.8 MEDIUM | Cisco Identity Services Engine Multiple Cross-Site Scripting Vulnerabilities |
| CVE-2026-20060 | 4.7 MEDIUM | Cisco Unity Connection Open Redirect Vulnerability |
| CVE-2026-20061 | 4.3 MEDIUM | Cisco Unity Connection SQL Injection Vulnerability |
IV. Related Vulnerabilities
Same product: Cisco Unity Connection
-
CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability -
CVE-2026-20035
Cisco Unity Connection Server-Side Request Forgery Vulnerabi -
CVE-2026-20060
Cisco Unity Connection Open Redirect Vulnerability -
CVE-2026-20061
Cisco Unity Connection SQL Injection Vulnerability -
CVE-2026-20081
Cisco Unity Connection Arbitrary File Download Vulnerability
Same vendor: Cisco
-
CVE-2026-76504
Cisco Catalyst SD-WAN Manager System Account Authorization B -
CVE-2026-76426
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CIsco FTD Bypass Access List -
CVE-2026-76431
Cisco Identity Services Engine Arbitrary File Deletion Vulne -
CVE-2026-76427
Cisco ISE XML External Entity Injection Vulnerability
Same weakness: CWE-79
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CVE-2026-104313
WPC Estimated Delivery Date for WooCommerce <= 4.0.1 - Refle -
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CVE-2026-92974
Photo Gallery by 10Web <= 1.8.46 - Reflected Cross-Site Scri -
CVE-2026-103421
WPMobile.App <= 11.84 - Unauthenticated Stored Cross-Site Sc
V. Comments for CVE-2026-20059
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