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CVE-2026-50682 Microsoft CVE debrief

CVE-2026-50682 is an out-of-bounds read vulnerability in Windows Active Directory that allows an authorized attacker to deny service over a network. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity. The vulnerability affects Windows Active Directory and can be used to deny service over a network. System administrators and security teams should review the CVE record and NVD entry for more information.

Vendor
Microsoft
Product
Windows 10 Version 21H2
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

System administrators and security teams responsible for Windows Active Directory and related systems should be aware of this vulnerability and take necessary actions to mitigate it. They should review the CVE record and NVD entry for more information and plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Technical summary

The vulnerability is caused by an out-of-bounds read in Windows Active Directory, which allows an authorized attacker to deny service over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H. The vulnerability affects Windows Active Directory and has a CVSS score of 7.1.

Defensive priority

High priority should be given to patching and mitigating this vulnerability, as it can be used to deny service over a network.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Review and update Windows Active Directory configurations
  • Monitor system logs for potential attacks
  • Implement compensating controls to prevent exploitation
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T18:18:02.820Z and was last modified on 2026-07-21T19:55:31.190Z. The NVD entry is currently Analyzed. The vulnerability affects Windows Active Directory and has a CVSS score of 7.1. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H. The evidence is limited, and defenders should verify the affected scope and severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50682 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50682

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

  • CVE-2026-50682 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50682

    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.