CVE-2018-8120
HIGHCISA KEVEPSS 99th pctlDescription
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows Server 2008, Windows 7, Windows Server 2008 R2. This CVE ID is unique from CVE-2018-8124, CVE-2018-8164, CVE-2018-8166.
How to fix
Actively exploited, no published fix found yet
CISA required action: Apply updates per vendor instructions.
Federal remediation due: 2022-04-05
Known ransomware campaign use
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 99% of all known CVEs.
Microsoft Win32k Privilege Escalation Vulnerability
A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory.
Apply updates per vendor instructions.
Remediation due: 2022-04-05
Associated with ransomware campaigns
References
Related Vulnerabilities
Other CWE-404 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-44267 | Medium | 6.5 | 77% | - | Fix |
| CVE-2018-8210 | High | 7.8 | 24% | - | - |
| CVE-2018-8639 | High | 7.8 | 22% | KEV + Ransom | - |
| CVE-2023-3206 | Medium | 5.3 | 19% | - | - |
| CVE-2018-8450 | High | 8.8 | 16% | - | - |
| CVE-2025-1103 | Medium | 6.5 | 13% | - | - |
Common questions
How do I fix CVE-2018-8120?
No published fix for CVE-2018-8120 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-04-05. Apply the vendor's mitigations per CISA's guidance.
Is CVE-2018-8120 being actively exploited?
Yes. CVE-2018-8120 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. CISA has also linked it to known ransomware campaigns. US federal agencies were required to remediate it by 2022-04-05. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2018-8120?
CVE-2018-8120 has a CVSS v3 base score of 7.0, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-28.