Windows Domain Name Service Remote Code Execution Vulnerability

published 2026-10-13 26 d ago modified 2026-10-31 8 d ago also EUVD-2026-99604

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits: 0; none known

Access of resource using incompatible type ('type confusion') in DNS Server allows an authorized attacker to execute code over a network.

Patch / fix

fixed in 3 links 1

Microsoft Windows Server 2022 10.0.20348.5761
Microsoft Windows Server 2025 10.0.26100.33650
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33650

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70167 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 26 d ago (2026-10-13)

Exploit prediction

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows Server 2022
Microsoft Windows Server 2025
Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness

CWE-843 Access of Resource Using Incompatible Type
CWE-822 Untrusted Pointer Dereference

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2026-70167
vendor-advisory, patch

Sources

CVE List CVE-2026-70167
NVD CVE-2026-70167

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary