CVE-2026-84020: Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability
Use after free in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
Other sources
Windows Routing and Remote Access Service (RRAS) Elevation of Privilege 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 10.0.28000.3231Patch KB5127646 - 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 - 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 10.0.26100.9711Patch KB5127648 - 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 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected Windows system and able to execute an attack locally. The provided data does not indicate that remote exploitation is possible.
Which systems should be assessed?
Assess Microsoft Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025 systems. The affected component is the Windows Routing and Remote Access Service (RRAS).
What is the likely impact of successful exploitation?
Successful exploitation can elevate the attacker’s privileges on the local system. The supplied severity vector indicates high impacts to confidentiality, integrity, and availability.