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CVE-2026-44801 Microsoft CVE debrief

CVE-2026-44801 is a high-severity vulnerability in the Remote Desktop Client that allows an unauthorized attacker to execute code over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH. It was published on 2026-06-09T17:17:15.827Z and modified on 2026-06-12T17:20:04.780Z.

Vendor
Microsoft
Product
Remote Desktop client for Windows Desktop
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-07-09
Advisory published
2026-06-09
Advisory updated
2026-07-09

Who should care

Users of Microsoft Remote Desktop Client and Windows operating systems should be aware of this vulnerability and take necessary precautions.

Technical summary

The vulnerability is a heap-based buffer overflow in the Remote Desktop Client, which allows an attacker to execute code over a network. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server.

Defensive priority

High

Recommended defensive actions

  • Apply patches and updates from Microsoft as soon as possible.
  • Use secure communication protocols and encryption when accessing remote desktop services.
  • Limit access to remote desktop services to only those who need it.

Evidence notes

The vulnerability is confirmed by Microsoft and has been assigned a CVE ID. The CVSS score and vector are based on the official CVE record.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44801 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44801

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

  • CVE-2026-44801 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44801

    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.