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5.7
CVE-2026-69679: Windows DHCP Server can be stopped by attacker
CVE-2026-69679 · published 1 month ago
Summary
The DHCP service in Windows 10 (versions 1607 and 1809) and Windows Server 2012/2012 R2 can be disrupted by a malicious user who is already on the network. This could prevent devices from receiving IP addresses, causing network connectivity loss. Apply the latest Microsoft updates or patches to restore normal operation.
What to do
- Update microsoft windows 10 version 1607 to version 10.0.14393.9512 or later.
- Update microsoft windows 10 version 1809 to version 10.0.17763.9245 or later.
- Update microsoft windows server 2012 to version 6.2.9200.26349 or later.
- Update microsoft windows server 2012 (server core installation) to version 6.2.9200.26349 or later.
- Update microsoft windows server 2016 to version 10.0.14393.9512 or later.
- Update microsoft windows server 2016 (server core installation) to version 10.0.14393.9512 or later.
- Update microsoft windows server 2019 to version 10.0.17763.9245 or later.
- Update microsoft windows server 2019 (server core installation) to version 10.0.17763.9245 or later.
- Update microsoft windows server 2022 to version 10.0.20348.5622 or later.
- Update microsoft windows server 2025 to version 10.0.26100.33438 or later.
- Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33438 or later.
- Update microsoft windows_10_1607 to version 10.0.14393.9512 or later.
- Update microsoft windows_10_1809 to version 10.0.17763.9245 or later.
- Update microsoft windows_server_2016 to version 10.0.14393.9512 or later.
- Update microsoft windows_server_2019 to version 10.0.17763.9245 or later.
- Update microsoft windows_server_2022 to version 10.0.20348.5622 or later.
- Update microsoft windows_server_2025 to version 10.0.26100.33438 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | windows 10 version 1607 | < 10.0.14393.9512 |
| microsoft | windows 10 version 1809 | < 10.0.17763.9245 |
| microsoft | windows server 2012 | < 6.2.9200.26349 |
| microsoft | windows server 2012 (server core installation) | < 6.2.9200.26349 |
| microsoft | windows server 2012 r2 |
< 6.3.9600.23397 < 6.3.9600.23398 |
| microsoft | windows server 2012 r2 (server core installation) |
< 6.3.9600.23397 < 6.3.9600.23398 |
| microsoft | windows server 2016 | < 10.0.14393.9512 |
| microsoft | windows server 2016 (server core installation) | < 10.0.14393.9512 |
| microsoft | windows server 2019 | < 10.0.17763.9245 |
| microsoft | windows server 2019 (server core installation) | < 10.0.17763.9245 |
| microsoft | windows server 2022 | < 10.0.20348.5622 |
| microsoft | windows server 2025 | < 10.0.26100.33438 |
| microsoft | windows server 2025 (server core installation) | < 10.0.26100.33438 |
| microsoft | windows_10_1607 |
< 10.0.14393.9512 cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 |
< 10.0.17763.9245 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2012 |
r2 cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 |
< 10.0.14393.9512 cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2019 |
< 10.0.17763.9245 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2022 |
< 10.0.20348.5622 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2025 |
< 10.0.26100.33438 cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* |
Original advisory text
Windows DHCP Server Denial of Service Vulnerability
Out-of-bounds read in Windows DHCP Server allows an authorized attacker to deny service over an adjacent network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69679 vendor-advisory patch
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-125Out-of-bounds Read
CWE-843Type Confusion
Timeline
Published8 Sep 2026
Updated4 Nov 2026
First seen8 Sep 2026
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