Vulnerability in Network Optix Nx Witness Vms
CVE-2026-10056
CORS misconfiguration in the REST API of Network Optix Nx Witness VMS before version 6.1.2, when running in the default Standard security mode, on Linux and Windows allows an unauthenticated remote attacker to steal the session token of an authenticated user and perform Administrator Account Takeover via a malicious cross-origin web page visited by the victim. The High security mode is not affected.Workaround: For existing installations running in Standard security mode, set Access-Control-Allow-Credentials to false via the REST API: PATCH /rest/v2/system/settings with body {"supportedOrigins": "null"}. Alternatively, select High security level during initial setup. Solution: Update to Nx Witness VMS version 6.1.2 or later, in which Access-Control-Allow-Credentials is set to false in the default Standard security configuration.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Network Optix Nx Witness Vms — versions 0
Weakness classification (CWE)
References
- 96d4e157-0bf0-48b3-8efd-382c68caf4e0 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-10056?
- CVE-2026-10056 is a high-severity vulnerability in Network Optix Nx Witness Vms, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.5/10. Published 2026-05-29.
- How severe is CVE-2026-10056?
- High severity. CVSS v3 base score is 7.5 out of 10.