CVE-2026-83635

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

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83635	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_server_2012:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*
	cpe:2.3:o:microsoft:windows_server_2016::::::::
	cpe:2.3:o:microsoft:windows_server_2019::::::::
	cpe:2.3:o:microsoft:windows_server_2022:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

History

16 Oct 2026, 10:45

Type	Values Removed	Values Added
First Time		Microsoft Microsoft windows Server 2022 Microsoft windows Server 2019 Microsoft windows Server 2025 Microsoft windows Server 2012 Microsoft windows Server 2016
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83635 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83635 - Vendor Advisory
CPE		cpe:2.3:o:microsoft:windows_server_2016:::::::: cpe:2.3:o:microsoft:windows_server_2019:::::::: cpe:2.3:o:microsoft:windows_server_2022:::::::x64:* cpe:2.3:o:microsoft:windows_server_2025:::::::x64:* cpe:2.3:o:microsoft:windows_server_2012:-:::::::* cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*

13 Oct 2026, 19:20

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-13 19:20

Updated : 2026-10-16 10:45

NVD link : CVE-2026-83635

Mitre link : CVE-2026-83635

CVE.ORG link : CVE-2026-83635

JSON object : View

Products Affected

microsoft

windows_server_2016
windows_server_2019
windows_server_2022
windows_server_2025
windows_server_2012

CWE

CWE-125

Out-of-bounds Read

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"versions": [{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33650", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2025 (Server Core installation)", "versions": [{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33650", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2026-10-13T19:20:03.557", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83635", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "Out-of-bounds read in DNS Server allows an unauthorized attacker to deny service over a network."}], "lastModified": "2026-10-16T10:45:38.767", "configurations": [{"nodes": [{"negate": false, 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