Vulnerability · Published Aug 24, 2026 · Assigned by NX
CVE-2026-78414Cross-site scripting in Nx Witness VMS Web Administration allows session token exfiltration via a rogue peer site name
High 8.0
In plain English
A high-severity cross-site scripting in Nx Witness VMS from Network Optix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Network Optix | Nx Witness VMS | 0 – before 6.1.3 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H