CVE-2018-8611: Windows Kernel Memory Handling Elevation of Privilege

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: high.

high priorityThe flaw is a kernel elevation of privilege with confirmed exploitation in CISA KEV, though it requires local access and has a moderate EPSS score.

What it is

The Windows kernel fails to properly handle objects in memory, allowing a local attacker to elevate privileges. The flaw affects a broad set of Windows client and server releases, and Microsoft addressed it with a security update. Because it is a kernel-level elevation of privilege, successful exploitation gives an attacker full control of the affected system.

Impact

An attacker who exploits this flaw gains elevated privileges on the target host, potentially reaching SYSTEM-level access. That access can be used to disable security controls, install persistent malware, or move laterally.

Attack surface

The vulnerability is local (CVSS vector AV:L) and requires low privileges (PR:L) with no user interaction (UI:N). An attacker must already have code execution or an interactive session on the target machine to trigger the kernel memory handling flaw.

Exploitation

CVE-2018-8611 is listed in CISA's Known Exploited Vulnerabilities catalog, confirming exploitation in the wild. EPSS gives a 30-day exploitation probability of roughly 4.2 percent (90th percentile), and no ransomware campaign use is documented.

What to do

• Apply the Microsoft security update referenced in the MSRC advisory for all affected Windows versions.
• Restrict local interactive and remote logon rights to only trusted users to reduce the pool of potential local attackers.
• Enable and monitor kernel-level exploit protections such as Credential Guard, HVCI, and Attack Surface Reduction rules where supported.
• Maintain endpoint detection and response coverage on all affected Windows 7, 8.1, RT 8.1, 10, and Server 2008 through 2019 hosts.
• Track CISA KEV remediation deadlines and verify patching status across the fleet.

Detection

• Monitor for unexpected privilege escalation events, such as processes gaining SYSTEM or high-integrity tokens outside normal service behavior.
• Alert on suspicious kernel object manipulation or unusual driver and system call activity flagged by EDR telemetry.
• Correlate local logon events with subsequent high-privilege process creation on the same host.
• Hunt for known post-exploitation tooling and kernel exploit artifacts on affected Windows versions.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.