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PatchSiren cyber security CVE debrief

CVE-2026-44799 Microsoft CVE debrief

CVE-2026-44799 is a heap-based buffer overflow vulnerability in Microsoft Remote Desktop Client. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. An unauthorized attacker can exploit this vulnerability to execute code over a network.

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
2026-06-15
Advisory published
2026-06-09
Advisory updated
2026-06-15

Who should care

Administrators and users of Microsoft Remote Desktop Client, particularly those in environments where Remote Desktop Client is used to connect to untrusted or internet-facing networks.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in Microsoft Remote Desktop Client. This allows an attacker to execute arbitrary code on the affected system.

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible.
  • Limit exposure of Remote Desktop Client to untrusted or internet-facing networks.
  • Use secure connections and authenticate users before allowing access.

Evidence notes

The CVE record and details are sourced from official databases.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44799 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44799

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

  • CVE-2026-44799 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44799

    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.