Windows DHCP Client
CVE-2026-69781 — Windows DHCP Client Denial of Service Vulnerability
Executive Summary
Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.
Overview
6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Adjacent
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.7
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
8 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 11 Version 24H2 for ARM64-based Systems | 5124008 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 24H2 for x64-based Systems | 5124008 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 25H2 for ARM64-based Systems | 5124008 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 25H2 for x64-based Systems | 5124008 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 26H1 for ARM64-based Systems | 5124012 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 version 26H1 for x64-based Systems | 5124012 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2025 | 5122871 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2025 (Server Core installation) | 5122871 (Security Update) |
Important | Denial of Service | Yes |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5124008 |
Security Update | Yes |
5124012 |
Security Update | Yes |
5122871 |
Security Update | Yes |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Jay Ladhad
References
On This Page