CVE-2026-21510: CWE-693: Protection Mechanism Failure in Microsoft Windows 10 Version 1607
Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-21510) involves a protection mechanism failure classified under CWE-693 in Windows Shell on Windows 10 Version 1607 (build 10.0.14393.0). It allows an attacker without privileges to bypass security features remotely over a network, potentially leading to full compromise of confidentiality, integrity, and availability of the affected system. The CVSS v3.1 base score is 8.8, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and full impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to bypass security protections remotely, resulting in complete compromise of the affected Windows 10 Version 1607 system's confidentiality, integrity, and availability. This could enable unauthorized access to sensitive data, system manipulation, or denial of service conditions.
Mitigation Recommendations
Microsoft has released an official fix for CVE-2026-21510. It is strongly recommended to apply the security update provided by Microsoft as soon as possible to remediate this vulnerability. No additional mitigations are specified by the vendor advisory.
CVE-2026-21510: CWE-693: Protection Mechanism Failure in Microsoft Windows 10 Version 1607
Description
Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-21510) involves a protection mechanism failure classified under CWE-693 in Windows Shell on Windows 10 Version 1607 (build 10.0.14393.0). It allows an attacker without privileges to bypass security features remotely over a network, potentially leading to full compromise of confidentiality, integrity, and availability of the affected system. The CVSS v3.1 base score is 8.8, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and full impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to bypass security protections remotely, resulting in complete compromise of the affected Windows 10 Version 1607 system's confidentiality, integrity, and availability. This could enable unauthorized access to sensitive data, system manipulation, or denial of service conditions.
Mitigation Recommendations
Microsoft has released an official fix for CVE-2026-21510. It is strongly recommended to apply the security update provided by Microsoft as soon as possible to remediate this vulnerability. No additional mitigations are specified by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-30T18:10:54.845Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21510","vendor":"Microsoft"}]
Threat ID: 698b76054b57a58fa120a676
Added to database: 2/10/2026, 6:16:37 PM
Last enriched: 5/12/2026, 5:14:08 AM
Last updated: 5/22/2026, 12:01:06 PM
Views: 874
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.
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.