CVE-2026-42984: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
CVE-2026-42984 is a use-after-free vulnerability in the Windows Kernel of Microsoft Windows 10 Version 1809. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating and a CVSS score of 7. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
CVE-2026-42984 is a use-after-free vulnerability (CWE-416) in the Windows Kernel component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). The vulnerability enables an authorized attacker with local access to elevate privileges, potentially gaining higher system rights. The CVSS v3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability, with attack vector local, attack complexity high, and privileges required low. Microsoft has published an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges on the affected Windows 10 Version 1809 system. This can lead to full control over the system, compromising confidentiality, integrity, and availability of data and system resources.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42984 to remediate this vulnerability.
CVE-2026-42984: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Description
CVE-2026-42984 is a use-after-free vulnerability in the Windows Kernel of Microsoft Windows 10 Version 1809. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating and a CVSS score of 7. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.0high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42984 is a use-after-free vulnerability (CWE-416) in the Windows Kernel component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). The vulnerability enables an authorized attacker with local access to elevate privileges, potentially gaining higher system rights. The CVSS v3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability, with attack vector local, attack complexity high, and privileges required low. Microsoft has published an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges on the affected Windows 10 Version 1809 system. This can lead to full control over the system, compromising confidentiality, integrity, and availability of data and system resources.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42984 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T23:43:50.745Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42984","vendor":"Microsoft"}]
Threat ID: 6a284ccb8dd33fbd85664951
Added to database: 6/9/2026, 5:26:35 PM
Last enriched: 6/9/2026, 10:56:16 PM
Last updated: 6/10/2026, 5:04:45 AM
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.