CVE-2026-34339: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to deny service locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34339) is a null pointer dereference (CWE-476) in the Lightweight Directory Access Protocol (LDAP) implementation of Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this flaw to cause a denial of service condition by causing the system to dereference a null pointer, leading to a crash or service interruption. The CVSS v3.1 base score is 5.5, reflecting a medium severity with local attack vector, low complexity, and no user interaction required. Microsoft has published an official fix for this vulnerability.
Potential Impact
The impact of this vulnerability is limited to denial of service (availability) on affected Windows 10 Version 1607 systems. It does not affect confidentiality or integrity. Exploitation requires local access and authorized privileges. 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 update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34339 to remediate this vulnerability. No additional mitigation steps are specified or required once the patch is applied.
CVE-2026-34339: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Description
Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to deny service locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34339) is a null pointer dereference (CWE-476) in the Lightweight Directory Access Protocol (LDAP) implementation of Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this flaw to cause a denial of service condition by causing the system to dereference a null pointer, leading to a crash or service interruption. The CVSS v3.1 base score is 5.5, reflecting a medium severity with local attack vector, low complexity, and no user interaction required. Microsoft has published an official fix for this vulnerability.
Potential Impact
The impact of this vulnerability is limited to denial of service (availability) on affected Windows 10 Version 1607 systems. It does not affect confidentiality or integrity. Exploitation requires local access and authorized privileges. 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 update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34339 to remediate this vulnerability. No additional mitigation steps are specified or required once the patch is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-26T21:02:16.446Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34339","vendor":"Microsoft"}]
Threat ID: 6a036540cbff5d861008c47e
Added to database: 5/12/2026, 5:37:04 PM
Last enriched: 5/12/2026, 7:23:06 PM
Last updated: 5/13/2026, 4:50:48 AM
Views: 2
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