CVE-2026-83856: Windows Event Logging Service Remote Code Execution Vulnerability
Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code over a network.
Other sources
Windows Event Logging Service Remote Code Execution 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 10.0.26300.9711Patch 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 10.0.20348.5761Patch KB5126655 - 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 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648
Event History
Frequently Asked Questions
Which systems are identified as affected?
Microsoft Windows 11, Microsoft Windows Server 2022, and Microsoft Windows Server 2025 are listed.
What level of access does an attacker need?
The vulnerability is network-reachable and does not require attacker privileges. Exploitation requires user interaction and has high attack complexity.
What impact could successful exploitation have?
Successful exploitation could allow code execution and affect confidentiality, integrity, and availability at a high level.