CVE-2026-83795: Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
Heap-based buffer overflow in Windows IKE Extension allows an unauthorized attacker to deny service over a network.
Other sources
Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
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 10.0.26300.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651
Event History
Frequently Asked Questions
Which systems should be prioritized for review?
Review Microsoft Windows 10, Windows 11, and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems. The provided information does not identify specific editions, builds, or configurations within those product families.
Does exploitation require credentials or user interaction?
No. The vulnerability is rated network-accessible with low attack complexity, no privileges required, and no user interaction required, indicating an unauthenticated remote attacker can attempt exploitation.
What is the expected impact of a successful exploit?
The stated impact is denial of service. The provided vector indicates no confidentiality or integrity impact, while availability impact is high.
How can defenders determine whether a system is affected?
Use the listed Windows product families as the available scope indicator and consult the referenced Microsoft advisory for applicability details. The provided data does not include affected build numbers, patch identifiers, or detection indicators.