Vulnerabilities
CVE-2026-69967: Windows Overlay Filter Out‑of‑Bounds Read Enables Local Information Disclosure
Microsoft identified an out‑of‑bounds read in the Windows Overlay Filter that allows a local user to read protected memory. The flaw exists in Windows 10 and 11 and is fixed by the latest cumulative update. Administrators should apply the patch and verify service configuration immediately.
Microsoft reported an out‑of‑bounds read in the Windows Overlay Filter component. An attacker who can run code on the local machine can read memory beyond the intended buffer and expose data that should be protected.
Impact
The vulnerability is local and requires the attacker to have legitimate user privileges. It can leak arbitrary memory contents, potentially revealing credentials, encryption keys, or other confidential information. No remote code execution or privilege escalation is possible.
Mitigation
- Apply the latest cumulative update for Windows 10/11 (KBxxxxxx).
- Ensure the Overlay Filter service is running with the least privilege; consider disabling the service if not needed.
- Run a full system scan with Microsoft Defender to detect any exploitation attempts.
What to Do
Apply the patch, verify that the service is correctly configured, and monitor logs for anomalous memory access patterns.
Related vulnerabilities
Windows Overlay Filter RCE Vulnerability (CVE‑2026‑69959) – Immediate Patch Required
Microsoft has disclosed a high‑severity out‑of‑bounds read in the Windows Overlay Filter that allows an authorized user to execute arbitrary code locally. The flaw is fixed in the latest security update; administrators must apply the patch and verify system integrity.
Read briefing
CVE-2026-69950: Windows Overlay Filter Privilege Escalation Vulnerability
A buffer over-read in Windows Overlay Filter (CVE‑2026‑69950) lets local users elevate privileges. Microsoft has released a patch; defenders should apply updates, restrict local privileges, and monitor for suspicious activity.
Read briefing
CVE-2026-70063: Local Windows Kernel Information Disclosure Vulnerability
Microsoft has identified CVE-2026-70063, an out‑of‑bounds read in the Windows kernel that permits a local, authorized attacker to read sensitive memory. The flaw is fixed in the latest cumulative update for Windows 10, Windows 11, and Windows Server 2022. Defenders should verify that the update is installed and monitor for any anomalous local privilege activity.
Read briefing
Windows iSCSI Out-of-Bounds Read Enables Local Information Disclosure (CVE‑2026‑69721)
Microsoft disclosed an out-of-bounds read flaw in the Windows iSCSI Initiator service that lets local users with sufficient privileges read sensitive memory. The vulnerability affects all Windows systems running iSCSI and can expose credentials or keys. Defenders should patch immediately, disable iSCSI if unused, and limit local privileges.
Read briefing