CVE-2026-62745: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-62745) involves an integer underflow (wrap or wraparound) in the Windows DHCP Server on Windows 10 Version 1607 (build 10.0.14393.0). The flaw can be exploited by an unauthorized attacker to disclose information across an adjacent network segment. The CVSS 3.1 vector indicates the attack requires adjacent network access with low complexity and no privileges or user interaction. The impact is limited to confidentiality loss without integrity or availability impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker with access to an adjacent network can exploit this integer underflow vulnerability to disclose sensitive information from the affected Windows DHCP Server. There is no impact on integrity or availability. The confidentiality impact is rated high per CVSS, but overall severity is medium.
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-2026-62745 to remediate this vulnerability.
CVE-2026-62745: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
Description
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-62745) involves an integer underflow (wrap or wraparound) in the Windows DHCP Server on Windows 10 Version 1607 (build 10.0.14393.0). The flaw can be exploited by an unauthorized attacker to disclose information across an adjacent network segment. The CVSS 3.1 vector indicates the attack requires adjacent network access with low complexity and no privileges or user interaction. The impact is limited to confidentiality loss without integrity or availability impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker with access to an adjacent network can exploit this integer underflow vulnerability to disclose sensitive information from the affected Windows DHCP Server. There is no impact on integrity or availability. The confidentiality impact is rated high per CVSS, but overall severity is medium.
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-2026-62745 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:01:21.823Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62745","vendor":"Microsoft"}]
Threat ID: 6a7b5811bf8831d539155b8d
Added to database: 08/11/2026, 17:12:49 UTC
Last enriched: 08/11/2026, 21:57:48 UTC
Last updated: 08/12/2026, 01:11:10 UTC
Views: 3
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