CVE Tools
Sign in

CVE-2026-50518

Windows DHCP Server Remote Code Execution Vulnerability

Published: Jul 14, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-122
9.8CRITICAL
NVD MITRE
EPSS Score
7.4%
Top 6.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

In plain language

AI Act now

This is a Windows DHCP Server flaw that can let an attacker run malicious code remotely without logins or user clicks; if you run DHCP Server on the affected Windows versions, you should treat it as urgent and patch.

Executive summary

CVE-2026-50518 is an unauthenticated, network-reachable heap-based buffer overflow in the Windows DHCP Server that can allow remote arbitrary code execution (CWE-122) with no user interaction required.

If affected, business impact
Full server compromiseNetwork-wide disruptionCredential theft riskRansomware enablement

What to do now

  1. Check whether this device runs the DHCP Server role (and whether DHCP server traffic can reach it).
  2. Confirm the exact Windows version/build number on the server (Windows 10 or one of the listed Windows Server versions).
  3. Upgrade/patch to the fixed build for your specific branch: Windows 10 10.0.14393.9339 or 10.0.17763.9020; Windows Server 2012 6.2.9200.26226; Windows Server 2012 R2 6.3.9600.23291; Windows Server 2016 10.0.14393.9339; Windows Server 2019 10.0.17763.9020; Windows Server 2022 10.0.20348.5386; Windows Server 2025 10.0.26100.33158.
  4. If patching must be delayed, restrict network access so untrusted clients/networks cannot reach the DHCP Server service (allow only your approved admin networks and subnets).
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-122

Affected Products

Microsoft
commercial·US
Windows 10 Version 1607On-premOS
Operating Systems / windows
Windows Server 2012 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2012 R2 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2016 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2019 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2022On-premOS
Operating Systems / windows
Windows Server 2025 (Server Core installation)On-premOS
Operating Systems / windows
and 6 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
Is your org exposed to CVE-2026-50518?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50518
msrc.microsoft.com
News mentions
6

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-50518 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows