---
id: "CVE-2026-118739"
page: "https://infrastack.ai/live/CVE-2026-118739"
kind: "vulnerability"
aliases: ["CVE-2026-118739"]
title: "Windows DHCP Client: memory leak lets nearby attacker deny service"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["dhcp-client", "enterprise-endpoints", "infrastructure", "windows"]
not_affected_if: ["no-adjacent-attacker", "static-addressing"]
published_at: "2026-11-10T19:19:50+00:00"
first_seen_at: "2026-11-10T19:24:55+00:00"
updated_at: "2026-11-10T19:57:42+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118739", "first_seen_at": "2026-11-10T19:24:55+00:00"}]
exploit_sources: []
---

# Windows DHCP Client: memory leak lets nearby attacker deny service

Link for people: https://infrastack.ai/live/CVE-2026-118739 (this .md is for agents)

The Windows DHCP Client does not release memory after it is no longer needed, a memory leak. An unauthorized attacker on the same adjacent network can exhaust memory and deny service to the machine.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Windows build with `winver` and compare it against the Microsoft security update guide entry for CVE-2026-118739

## Timeline

- 2026-11-10T19:24:55+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118739

## From the sources

Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_