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PatchSiren cyber security CVE debrief

CVE-2026-47654 Microsoft CVE debrief

CVE-2026-47654 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 2026-06-09T17:17:36.933Z and modified on 2026-06-12T17:27:29.240Z.

Vendor
Microsoft
Product
Windows Server 2016
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

Administrators and users of Microsoft Remote Desktop Client, particularly those using Windows Server 2016, 2019, 2022, and 2025.

Technical summary

The vulnerability is a heap-based buffer overflow in the Remote Desktop Client. It requires user interaction (UI:R) and can be exploited over the network (AV:N). Successful exploitation can lead to high impact on confidentiality, integrity, and availability (C:H/I:H/A:H).

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible.
  • Limit exposure by restricting access to Remote Desktop Client.
  • Monitor for suspicious activity related to Remote Desktop Client.

Evidence notes

The vulnerability is confirmed by Microsoft and has been analyzed by NVD.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47654 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47654

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

  • CVE-2026-47654 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47654

    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.