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CVE-2026-78414— Cross-site scripting in Nx Witness VMS Web Administration allows session token exfiltration via a rogue peer site name

Quick assessment

Affected
Network Optix Nx Witness VMS
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.

在网络安防系统 Network Optix Nx Witness VMS（适用于 Linux、Windows 和 macOS 平台）6.1.3 版本之前的 Web 管理界面中存在跨站脚本（XSS）漏洞。该漏洞允许同一网络段的攻击者在已认证管理员的浏览器中执行任意 JavaScript 代码，并窃取管理员的会话令牌，从而导致管理员账户被接管。 具体而言，攻击者若控制同一网络网段中的一台 Nx 服务器，可将其站点名称设置为恶意脚本载荷。当管理员打开“与另一站点合并”（Merge with Another Site）对话

CVSS 8.0 · High
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I. Basic Information for CVE-2026-78414

Vulnerability Information
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Vulnerability Title
Cross-site scripting in Nx Witness VMS Web Administration allows session token exfiltration via a rogue peer site name
Source: CVE Program / CVE List V5
Vulnerability Description
Cross-site scripting in the Web Administration interface of Network Optix Nx Witness VMS before version 6.1.3 on Linux, Windows and MacOS allows an adjacent-network attacker to execute arbitrary JavaScript in the browser of an authenticated administrator and steal the administrator's session token, resulting in Administrator Account Takeover. An attacker who controls an Nx server on the same network segment can set that server's site name to a script payload, which executes when an administrator opens the "Merge with Another Site" dialog and the site selection list is displayed.Solution: Update to Nx Witness VMS version 6.1.3 or later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Network Optix Nx Witness VMS 0 ~ 6.1.3 -

II. Public POCs for CVE-2026-78414

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III. Intelligence Information for CVE-2026-78414

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IV. Related Vulnerabilities

Same product: Nx Witness VMS
Same vendor: Network Optix
Same weakness: CWE-79

V. Comments for CVE-2026-78414

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