---
id: CVE-2026-62718
title: >-
  Integer underflow (wrap or wraparound) in Windows DHCP Server allows an
  unauthorized attacker to disclose information over an adjacent network.
summary: >-
  Integer underflow (wrap or wraparound) in Windows DHCP Server allows an
  unauthorized attacker to disclose information over an adjacent network.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
  - CWE-191
vendor: microsoft
product: windows_10_1607
affected:
  - windows_10_1607 < 10.0.14393.9418
  - windows_10_1809 < 10.0.17763.9115
  - windows_server_2012
  - windows_server_2012 = r2
  - windows_server_2016 < 10.0.14393.9418
  - windows_server_2019 < 10.0.17763.9115
  - windows_server_2022 < 10.0.20348.5440
  - windows_server_2025 < 10.0.26100.33222
patched:
  - windows_10_1607 10.0.14393.9418
  - windows_10_1809 10.0.17763.9115
  - windows_server_2016 10.0.14393.9418
  - windows_server_2019 10.0.17763.9115
  - windows_server_2022 10.0.20348.5440
  - windows_server_2025 10.0.26100.33222
published: '2026-08-11'
updated: '2026-08-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62718'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62718'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00537
epssPercentile: 0.42743
ingestedAt: '2026-08-16T23:44:38.462Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-11T19:47:40.891233Z'
---

## Overview

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

## Affected

- `windows_10_1607 < 10.0.14393.9418`
- `windows_10_1809 < 10.0.17763.9115`
- `windows_server_2012`
- `windows_server_2012 = r2`
- `windows_server_2016 < 10.0.14393.9418`
- `windows_server_2019 < 10.0.17763.9115`
- `windows_server_2022 < 10.0.20348.5440`
- `windows_server_2025 < 10.0.26100.33222`

## Remediation

Upgrade past the affected range:

- `windows_10_1607 10.0.14393.9418`
- `windows_10_1809 10.0.17763.9115`
- `windows_server_2016 10.0.14393.9418`
- `windows_server_2019 10.0.17763.9115`
- `windows_server_2022 10.0.20348.5440`
- `windows_server_2025 10.0.26100.33222`