CVE-2026-10056Network attack vector

Administrator account takeover via credentialed wildcard CORS

Published May 29, 2026 · Updated May 29, 2026

CORS misconfiguration in Network Optix Nx Witness VMS before 6.1.2 allows remote attackers to steal sessions and take over administrator accounts. The Media Server REST API combines wildcard origin matching with Access-Control-Allow-Credentials enabled, exposing authenticated browser sessions to cross-origin scripts. Exploitation requires an authenticated user to visit a malicious page; High security mode is not affected, and the published vulnerable deployments are Linux and Windows.

CVSS severity7.5
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CORS misconfiguration in Network Optix Nx Witness VMS before 6.1.2 allows remote attackers to steal sessions and take over administrator accounts. The Media Server REST API combines wildcard origin matching with Access-Control-Allow-Credentials enabled, exposing authenticated browser sessions to cross-origin scripts. Exploitation requires an authenticated user to visit a malicious page; High security mode is not affected, and the published vulnerable deployments are Linux and Windows.

The record

CVE
CVE-2026-10056
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Network Optix
Product
Nx Witness VMS
Classifications
CWE-942, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Network Optix · Nx Witness VMSversion=0 <6.1.2

Published CVSS scores

7.5Network OptixCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Permissive Cross-domain Policy with Untrusted Domains
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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