CVE-2026-54990: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 Version 24H2
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-54990) involves a heap-based buffer overflow in the Remote Desktop Client on Windows 11 Version 24H2 (build 10.0.26100.0). The flaw enables remote code execution by an unauthenticated attacker over the network. The CVSS v3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on affected systems without any privileges or user interaction, potentially leading to full system compromise. The vulnerability affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official patch is available from Microsoft to remediate this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990 for detailed patch information and deployment guidance.
CVE-2026-54990: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 Version 24H2
Description
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-54990) involves a heap-based buffer overflow in the Remote Desktop Client on Windows 11 Version 24H2 (build 10.0.26100.0). The flaw enables remote code execution by an unauthenticated attacker over the network. The CVSS v3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on affected systems without any privileges or user interaction, potentially leading to full system compromise. The vulnerability affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official patch is available from Microsoft to remediate this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990 for detailed patch information and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:10:05.868Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990","vendor":"Microsoft"}]
Threat ID: 6a566f7e68715ace43e6bc16
Added to database: 07/14/2026, 17:18:54 UTC
Last enriched: 08/13/2026, 15:25:11 UTC
Last updated: 08/28/2026, 11:04:21 UTC
Views: 154
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