CVE-2026-83906: Windows Shell Spoofing Vulnerability
Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
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 10.0.26100.9711Patch KB5127648 - 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 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - 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 10.0.26100.33650Patch KB5126646
Event History
Frequently Asked Questions
Does exploitation require user interaction?
Yes. The attack vector indicates user interaction is required, even though the attacker does not need prior privileges.
Does an attacker need an account or local access?
No prior privileges are required. The vulnerability is reachable over the network with low attack complexity.
What is the expected security impact?
The rated impact is high for confidentiality. Integrity and availability impact are rated as none.
Which products are identified as affected?
The affected software listed is Microsoft Windows 11 and Microsoft Windows Server 2025.