CVE-2026-70580: Windows Credential Guard Spoofing Vulnerability
Missing authentication for critical function in Windows Credential Guard allows an authorized attacker to perform spoofing locally.
Other sources
Windows Credential Guard Spoofing 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 10.0.26100.9711Patch 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 10.0.26100.33650Patch 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 10.0.17763.9376Patch KB5126651 - 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 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attacker needs local access and low-level privileges on the affected system. The attack does not require user interaction.
Which environments should be prioritized for assessment?
Prioritize systems running Microsoft Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, or Windows Server 2025 where Microsoft Windows Credential Guard is in use.
What is the potential impact of successful exploitation?
Successful exploitation can allow local spoofing and is rated high severity. The provided vector indicates potential high impact to confidentiality, integrity, and availability, including scope change.