High severity · published Sep 8, 2026
CVE-2026-69858
Windows DNS Server Remote Code Execution Vulnerability
8.1
CVSS
0.7%
EPSS
No
On KEV
Description
Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% 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 10.0.20348.5622 · source: vendor, NVD
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.33438 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.33438 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-69858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-69858
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69858
More from Windows Server 2022
9.8
CVE-2026-33824
Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
9.8
CVE-2025-59287
Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
8.8
CVE-2026-96951
Windows Shell Security Feature Bypass Vulnerability
8.8
CVE-2026-21510
Windows Shell Security Feature Bypass Vulnerability
8.8
CVE-2026-21513
MSHTML Framework Security Feature Bypass Vulnerability