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PatchSiren cyber security CVE debrief

CVE-2026-44810 Microsoft CVE debrief

CVE-2026-44810 is a HIGH-severity vulnerability in Windows Cryptographic Services, with a CVSS score of 8.4. The vulnerability allows an unauthorized attacker to elevate privileges locally due to improper authentication. The CVE was published on 2026-06-09T17:17:17.013Z and last modified on 2026-06-11T17:13:17.257Z.

Vendor
Microsoft
Product
Windows 11 version 23H2
CVSS
HIGH 8.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Administrators and users of Microsoft Windows 11 and Windows Server systems should be aware of this vulnerability, as it can allow for local privilege escalation.

Technical summary

The vulnerability is caused by improper authentication in Windows Cryptographic Services. This allows an attacker to elevate their privileges locally. The vulnerability affects various versions of Windows 11 and Windows Server, including Windows 11 23H2, 24H2, 25H2, 26H1, Windows Server 2022, and Windows Server 2025.

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible.
  • Ensure that Windows systems are up-to-date with the latest security updates.
  • Consider implementing additional security measures, such as multi-factor authentication and monitoring for suspicious activity.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Microsoft has provided a vendor advisory for this vulnerability at [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44810 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44810

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

  • CVE-2026-44810 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44810

    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.