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CVE-2026-61363 Microsoft CVE debrief

The CVE-2026-61363 record describes a heap-based buffer overflow vulnerability in Microsoft Remote Desktop Client. This vulnerability allows an unauthorized attacker to execute code over a network, impacting multiple versions of Windows 10, Windows 11, and Windows Server 2012, 2016, 2019, 2022, 2025. Organizations using Microsoft Remote Desktop Client, especially those with exposed or internet-facing installations, should prioritize patching to prevent potential code execution attacks. The CVE record was published on 2026-08-11T17:18:11.190Z and has not been modified since then. The NVD entry is currently Analyzed. To address this vulnerability, it is crucial to apply patches from Microsoft for Remote Desktop Client and to inventory and update affected Windows versions and servers.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-08-16
Advisory published
2026-08-11
Advisory updated
2026-08-16

Who should care

Organizations using Microsoft Remote Desktop Client, particularly those with exposed or internet-facing installations, should prioritize patching to prevent potential code execution attacks. This includes reviewing the current deployment of Remote Desktop Client, assessing the vulnerability's impact on their specific environment, and taking immediate action to patch vulnerable systems. Additionally, security teams should monitor for suspicious activity related to Remote Desktop Client usage.

Technical summary

A heap-based buffer overflow vulnerability exists in Microsoft Remote Desktop Client, allowing an unauthorized attacker to execute code over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Affected products include multiple versions of Windows 10, Windows 11, and Windows Server 2012, 2016, 2019, 2022, 2025. Organizations should prioritize patching to prevent potential code execution attacks. The CVE record indicates that multiple Windows versions and servers are affected.

Defensive priority

Organizations using Microsoft Remote Desktop Client should prioritize patching to prevent potential code execution attacks.

Recommended defensive actions

  • Apply patches from Microsoft for Remote Desktop Client
  • Inventory and update affected Windows versions and servers
  • Monitor for suspicious Remote Desktop Client activity
  • Implement compensating controls for Remote Desktop Client usage
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record indicates a heap-based buffer overflow in Microsoft Remote Desktop Client, allowing unauthorized attackers to execute code over a network. The CVSS score is 7.5 with a HIGH severity. Multiple Windows versions and servers are affected, including Windows 10, Windows 11, and Windows Server 2012, 2016, 2019, 2022, 2025.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-61363 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-61363

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

  • CVE-2026-61363 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-61363

    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.