PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-50508 Microsoft CVE debrief

CVE-2026-50508 is a vulnerability in Windows NTLM that allows an unauthorized attacker to perform spoofing over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. It was published on 2026-06-09T17:17:50.027Z and last modified on 2026-06-09T19:32:51.440Z.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-17
Advisory published
2026-06-09
Advisory updated
2026-06-17

Who should care

Users of Windows NTLM

Technical summary

The vulnerability is caused by exposure of sensitive information to an unauthorized actor in Windows NTLM, allowing an unauthorized attacker to perform spoofing over a network.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply patches or updates from the vendor as they become available.
  • Implement network segmentation and isolation to limit the attack surface.
  • Monitor network traffic for suspicious activity.

Evidence notes

The vendor is listed as Unknown Vendor, but there is evidence suggesting the vendor may be Microsoft.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50508 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50508

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50508 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50508

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.