Windows DHCP Server
CVE-2026-88171 — Windows DHCP Server Remote Code Execution Vulnerability
Executive Summary
Double free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
Overview
8.1
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.1
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
16 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1607 for 32-bit Systems | 5126868 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for x64-based Systems | 5126868 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 5126651 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for x64-based Systems | 5126651 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 | 5126835 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 (Server Core installation) | 5126835 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 R2 | 5126836 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 R2 (Server Core installation) | 5126836 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 | 5126868 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 (Server Core installation) | 5126868 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 | 5126651 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 (Server Core installation) | 5126651 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2022 | 5126655 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2022 (Server Core installation) | 5126655 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2025 | 5126646 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2025 (Server Core installation) | 5126646 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
6 patches
| Article | Type | Restart |
|---|---|---|
5126868 |
Security Update | Yes |
5126651 |
Security Update | Yes |
5126835 |
Security Update | Yes |
5126836 |
Security Update | Yes |
5126655 |
Security Update | Yes |
5126646 |
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
Thanatos Tian (HKPolyU) & npc0vo
Jonghoi Kim
Donghyeon Oh with KloyLab
Linzishan
sabersauce
References
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