CVE-2026-69564: Windows Online Certificate Status Protocol (OCSP) Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Online Certificate Status Protocol (OCSP) allows an authorized attacker to elevate privileges locally.
Other sources
Windows Online Certificate Status Protocol (OCSP) 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 6.2.9200.26349Patch KB5123065 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
An attacker must already be authorized on the affected Windows system and exploit the vulnerability locally. The provided data does not indicate that remote or unauthenticated exploitation is possible.
Which systems should be prioritized for review?
Review Microsoft Windows 10 and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems. The vulnerability can result in elevation of privilege with high impact to confidentiality, integrity, and availability.
Is exploitability expected to be straightforward?
The supplied vector rates attack complexity as high, indicating exploitation requires conditions beyond simply having local authorized access. No further prerequisites or configuration details are provided.