CVE-2026-42903: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
A null pointer dereference vulnerability exists in the Windows Kerberos component of Microsoft Windows 10 Version 1607 (build 10. 0. 14393. 0). This flaw allows an authorized attacker to cause a denial of service over the network. The vulnerability has a medium severity rating with a CVSS score of 6. 5. An official fix is available from Microsoft.
AI Analysis
Technical Summary
CVE-2026-42903 is a null pointer dereference vulnerability (CWE-476) in the Windows Kerberos implementation on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with authorized access can exploit this flaw to cause a denial of service condition remotely over the network. The vulnerability does not impact confidentiality or integrity but affects availability. Microsoft has released an official fix to address this issue.
Potential Impact
The vulnerability allows an authorized attacker to cause a denial of service (DoS) over the network by triggering a null pointer dereference in the Windows Kerberos component. There is no impact on confidentiality or integrity. 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-2026-42903 to remediate this vulnerability.
CVE-2026-42903: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Description
A null pointer dereference vulnerability exists in the Windows Kerberos component of Microsoft Windows 10 Version 1607 (build 10. 0. 14393. 0). This flaw allows an authorized attacker to cause a denial of service over the network. The vulnerability has a medium severity rating with a CVSS score of 6. 5. An official fix is available from Microsoft.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42903 is a null pointer dereference vulnerability (CWE-476) in the Windows Kerberos implementation on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with authorized access can exploit this flaw to cause a denial of service condition remotely over the network. The vulnerability does not impact confidentiality or integrity but affects availability. Microsoft has released an official fix to address this issue.
Potential Impact
The vulnerability allows an authorized attacker to cause a denial of service (DoS) over the network by triggering a null pointer dereference in the Windows Kerberos component. There is no impact on confidentiality or integrity. 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-2026-42903 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.968Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42903","vendor":"Microsoft"}]
Threat ID: 6a284cc08dd33fbd856646dc
Added to database: 6/9/2026, 5:26:24 PM
Last enriched: 6/9/2026, 11:12:17 PM
Last updated: 6/10/2026, 6:17:35 AM
Views: 5
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.