CVE-2026-97798: CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Microsoft Windows 10 Version 21H2
Description
CVE-2026-97798 is a high-severity vulnerability in Windows 10 Version 21H2 involving improper neutralization of argument delimiters in Windows Error Reporting. This flaw allows an authorized local attacker to perform argument injection, leading to privilege escalation. The vulnerability affects multiple specific builds of Windows 10 21H2 and related versions. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-97798 is a vulnerability classified as CWE-88 (Improper Neutralization of Argument Delimiters in a Command, also known as argument injection) affecting Windows Error Reporting in Microsoft Windows 10 Version 21H2. The flaw allows an authorized local attacker to elevate privileges by exploiting improper handling of argument delimiters in commands. The vulnerability has a CVSS v3.1 base score of 7.8 (high severity) with attack vector local, low attack complexity, requiring privileges, no user interaction, and impacts confidentiality, integrity, and availability. Multiple Windows 10 versions/builds are affected, with patches officially released by Microsoft.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 systems. The impact includes full compromise of confidentiality, integrity, and availability of the system due to the high CVSS impact metrics. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97798 for update details and installation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-25T04:41:33.498Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97798","vendor":"Microsoft"}]
Threat ID: 6ace85952cdf04f656a018ef
Added to database: 10/13/2026, 19:25:09 UTC
Last enriched: 10/13/2026, 22:49:11 UTC
Last updated: 10/14/2026, 03:08:32 UTC
Views: 4
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