CVE-2018-8550
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation...
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
- Record
CVE-2018-8550- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
- Record
CVE-2018-8550- Updated
- 2026-11-02
EUVDEUVD-2018-20171 No score
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
- Record
EUVD-2018-20171- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9g8w-9cx8-4wg9
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation...
An elevation of privilege exists in Windows COM Aggregate Marshaler, aka "Windows COM Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
- Record
GHSA-9g8w-9cx8-4wg9- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Microsoft Windows - DfMarshal Unsafe Unmarshaling Privilege Escalation | 2018-11-20 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-8550 is a high vulnerability (CVSS 7.8) in Microsoft Windows 10, published November 14, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.29%, the 88th percentile. No source names a fixed version.