Authenticated service crash via out-of-bounds read
Published Sep 8, 2026 · Updated Sep 10, 2026
Out-of-bounds read in Microsoft Windows DHCP Server allows remote authenticated users to crash the service via adjacent-network traffic. Microsoft identifies type confusion and an out-of-bounds read in the DHCP Server component but has not published the affected code locus or malformed field. The attack requires adjacent-network access and authorization; the reported consequence is availability loss without confidentiality or integrity impact.
Summary
What happened
Out-of-bounds read in Microsoft Windows DHCP Server allows remote authenticated users to crash the service via adjacent-network traffic. Microsoft identifies type confusion and an out-of-bounds read in the DHCP Server component but has not published the affected code locus or malformed field. The attack requires adjacent-network access and authorization; the reported consequence is availability loss without confidentiality or integrity impact.
The record
- CVE
- CVE-2026-69637
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-125, CWE-843, T1499.004
- Attack vector
- adjacent
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.9245
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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