CVE-2026-42993: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 21H2
CVE-2026-42993 is a heap-based buffer overflow vulnerability in the Remote Desktop Client component of Microsoft Windows 10 Version 21H2 (build 10. 0. 19044. 0). This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 7. 5. An official patch is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Remote Desktop Client on Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation could allow an attacker without privileges to execute arbitrary code remotely, impacting confidentiality, integrity, and availability. The vulnerability has been assigned CVE-2026-42993 and is classified under CWE-122. Microsoft has released an official fix to remediate the issue.
Potential Impact
Successful exploitation of this vulnerability could lead to remote code execution by an unauthorized attacker, resulting in full compromise of the affected system's confidentiality, integrity, and availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42993 to remediate this vulnerability.
CVE-2026-42993: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 21H2
Description
CVE-2026-42993 is a heap-based buffer overflow vulnerability in the Remote Desktop Client component of Microsoft Windows 10 Version 21H2 (build 10. 0. 19044. 0). This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 7. 5. An official patch is available from Microsoft to address this issue.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Remote Desktop Client on Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation could allow an attacker without privileges to execute arbitrary code remotely, impacting confidentiality, integrity, and availability. The vulnerability has been assigned CVE-2026-42993 and is classified under CWE-122. Microsoft has released an official fix to remediate the issue.
Potential Impact
Successful exploitation of this vulnerability could lead to remote code execution by an unauthorized attacker, resulting in full compromise of the affected system's confidentiality, integrity, and availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42993 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T23:43:50.746Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42993","vendor":"Microsoft"}]
Threat ID: 6a284ccb8dd33fbd85664966
Added to database: 6/9/2026, 5:26:35 PM
Last enriched: 6/9/2026, 10:55:41 PM
Last updated: 6/10/2026, 5:09:51 AM
Views: 11
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