CVE-2026-70166

Out-of-bounds read in Windows DNS allows an authorized attacker to deny service over a network.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2026-10-13

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:windows_10_1607
• microsoft:windows_10_1809
• microsoft:windows_server_2012
• microsoft:windows_server_2016
• microsoft:windows_server_2019
• microsoft:windows_server_2022
• microsoft:windows_server_2025

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70166

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