CVE-2026-69405

Service interruption via unreleased DHCP memory

Published Sep 8, 2026 · Updated Sep 9, 2026

Memory-release failure in Microsoft Windows DHCP Server allows remote authenticated users to interrupt service over an adjacent network. The DHCP Server service fails to release allocated memory after its effective lifetime, but Microsoft has not disclosed the triggering request or code path. Exploitation requires low privileges and adjacent-network access; repeated memory consumption denies availability without reported data exposure or modification.

CVSS severity5.7
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory-release failure in Microsoft Windows DHCP Server allows remote authenticated users to interrupt service over an adjacent network. The DHCP Server service fails to release allocated memory after its effective lifetime, but Microsoft has not disclosed the triggering request or code path. Exploitation requires low privileges and adjacent-network access; repeated memory consumption denies availability without reported data exposure or modification.

The record

CVE
CVE-2026-69405
Published
Sep 8, 2026
Updated
Sep 9, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-401, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.17763.0 <10.0.17763.9245

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.9245
Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.33438
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.9512
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.26349
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.26349
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.9512
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.23397
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.9245
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.9512
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.5622
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.33438
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.9245
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.23397

Published CVSS scores

5.7MicrosoftCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo