CVE-2026-62745

Analyzed Analyzed - Analysis Complete

Integer Underflow in Windows DHCP Server Information Disclosure

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62745

EUVD

EUVD-2026-56370

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_server_2016	to 10.0.14393.9418 (exc)
microsoft	windows_server_2019	to 10.0.17763.9115 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.
CWE-191	The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer underflow in the Windows DHCP Server. It allows an unauthorized attacker to disclose information over an adjacent network by exploiting this flaw.

Detection Guidance

This vulnerability involves an integer underflow in Windows DHCP Server enabling information disclosure. Detection requires monitoring DHCP server logs for unusual activity or errors related to integer underflow conditions. Check for unexpected DHCP lease allocations or malformed packets. Use network monitoring tools to inspect DHCP traffic for anomalies.

Impact Analysis

An attacker could exploit this to gain access to sensitive information transmitted over the network, potentially leading to data breaches or unauthorized access to confidential data.

Compliance Impact

This vulnerability could lead to unauthorized information disclosure, which may violate compliance requirements such as GDPR or HIPAA, depending on the data exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows DHCP Server vulnerability. Monitor network traffic for unusual activity and restrict adjacent network access to DHCP servers.

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