CVE-2026-69803: Windows DHCP Server Information Disclosure Vulnerability
Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to disclose information over a network.
Other sources
Windows DHCP Server Information Disclosure Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
Does an attacker need credentials or user interaction to exploit this issue?
No. The vulnerability is remotely reachable over a network and requires neither privileges nor user interaction, although exploitation has high attack complexity.
Which environments are in scope for triage?
Systems running Windows DHCP Server on the listed Microsoft Windows versions should be reviewed: Windows 10; Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025.
What security properties are affected besides information exposure?
The provided vector rates confidentiality impact as high. It indicates no integrity or availability impact.