CVE-2026-56186: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1607
Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-56186) involves an out-of-bounds read in the Windows Schannel security package on Windows 10 Version 1607. The flaw enables an attacker with authorized access to cause information disclosure remotely over a network. The CVSS 3.1 base score is 8.1, reflecting high impact on confidentiality and availability, with low attack complexity and no user interaction required. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this out-of-bounds read vulnerability in Schannel to disclose sensitive information remotely over a network. The vulnerability has a high impact on confidentiality (high) and availability (high), but does not affect integrity. Exploitation does not require user interaction and has low complexity.
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-2026-56186 to remediate this vulnerability.
CVE-2026-56186: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1607
Description
Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-56186) involves an out-of-bounds read in the Windows Schannel security package on Windows 10 Version 1607. The flaw enables an attacker with authorized access to cause information disclosure remotely over a network. The CVSS 3.1 base score is 8.1, reflecting high impact on confidentiality and availability, with low attack complexity and no user interaction required. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this out-of-bounds read vulnerability in Schannel to disclose sensitive information remotely over a network. The vulnerability has a high impact on confidentiality (high) and availability (high), but does not affect integrity. Exploitation does not require user interaction and has low complexity.
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-2026-56186 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-19T13:54:04.006Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56186","vendor":"Microsoft"}]
Threat ID: 6a5676ba68715ace43f0ae9c
Added to database: 07/14/2026, 17:49:46 UTC
Last enriched: 07/14/2026, 18:49:45 UTC
Last updated: 07/15/2026, 00:27:27 UTC
Views: 2
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