Remote code execution via heap buffer overflow
Published Jun 9, 2026 · Updated Jun 9, 2026
Heap-based buffer overflow in Microsoft's Remote Desktop Client allows remote attackers to execute code when a user connects to a malicious server. Microsoft has not disclosed which client component mishandles remote data or the specific bounds error that overwrites heap memory. Exploitation requires user interaction with an attacker-controlled Remote Desktop endpoint and runs code in the client's security context.
Summary
What happened
Heap-based buffer overflow in Microsoft's Remote Desktop Client allows remote attackers to execute code when a user connects to a malicious server. Microsoft has not disclosed which client component mishandles remote data or the specific bounds error that overwrites heap memory. Exploitation requires user interaction with an attacker-controlled Remote Desktop endpoint and runs code in the client's security context.
The record
- CVE
- CVE-2026-47289
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.8880
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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