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PatchSiren cyber security CVE debrief

CVE-2026-42992 Microsoft CVE debrief

CVE-2026-42992 is a high-severity vulnerability in the Remote Desktop Client, allowing unauthorized attackers to execute code over a network. The vulnerability is caused by a heap-based buffer overflow and has a CVSS score of 7.5.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-15
Advisory published
2026-06-09
Advisory updated
2026-06-15

Who should care

Users of Microsoft Windows App, Windows 10, Windows 11, and Windows Server products are affected by this vulnerability.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in the Remote Desktop Client. This allows an unauthorized attacker to execute code over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible.
  • Use secure communication protocols for Remote Desktop Client connections.
  • Limit access to Remote Desktop Client to only necessary users.

Evidence notes

The CVE record and NVD detail pages provide additional information about this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42992 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42992

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

  • CVE-2026-42992 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42992

    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.