CVE-2026-83889: Windows DNS Server Remote Code Execution Vulnerability
Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network.
Other sources
Windows DNS Server Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must be authorized, meaning exploitation requires low privileges before sending the network-based attack. No user interaction is required.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution on the affected DNS Server. The assigned vector indicates high impact to confidentiality, integrity, and availability.
Can this be exploited remotely?
Yes. The attack vector is network-based and has low attack complexity, so an authorized attacker can target a vulnerable DNS Server over the network.