High severity · published Oct 13, 2026
CVE-2026-70167
Windows Domain Name Service Remote Code Execution Vulnerability
8.8
CVSS
1%
EPSS
No
On KEV
Description
Access of resource using incompatible type ('type confusion') in DNS Server allows an authorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
Windows Server 2022 · Microsoft
10.0.20348.0 before 10.0.20348.5761 · source: vendor, NVD
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.33650 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.33650 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-70167
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-70167
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70167
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