CVE-2026-45635: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Access of resource using incompatible type ('type confusion') in Universal Plug and Play (upnp.dll) allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-45635 and classified under CWE-843 (Access of Resource Using Incompatible Type), affects the Universal Plug and Play (upnp.dll) component in Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows remote attackers to execute arbitrary code without privileges or user interaction by exploiting type confusion. The CVSS v3.1 base score is 8.1, indicating high severity with network attack vector, high complexity, no privileges required, and no user interaction needed. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary code remotely on affected Windows 10 Version 1607 systems, potentially leading to full system compromise with high confidentiality, integrity, and availability impact.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for CVE-2026-45635 as soon as possible. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45635 for detailed patch information and deployment instructions.
CVE-2026-45635: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Description
Access of resource using incompatible type ('type confusion') in Universal Plug and Play (upnp.dll) allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-45635 and classified under CWE-843 (Access of Resource Using Incompatible Type), affects the Universal Plug and Play (upnp.dll) component in Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows remote attackers to execute arbitrary code without privileges or user interaction by exploiting type confusion. The CVSS v3.1 base score is 8.1, indicating high severity with network attack vector, high complexity, no privileges required, and no user interaction needed. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary code remotely on affected Windows 10 Version 1607 systems, potentially leading to full system compromise with high confidentiality, integrity, and availability impact.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for CVE-2026-45635 as soon as possible. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45635 for detailed patch information and deployment instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T20:33:35.155Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45635","vendor":"Microsoft"}]
Threat ID: 6a284ce78dd33fbd85664ec0
Added to database: 06/09/2026, 17:27:03 UTC
Last enriched: 07/29/2026, 22:01:05 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 62
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