CVE-2018-8550

HIGH

Windows COM Aggregate Marshaler - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-8550. PoCs published by Google Security Research.

AI-analyzed exploit summary This is a detailed technical analysis of CVE-2018-8550, focusing on the unsafe unmarshaling in the DfMarshal COM object, which can lead to privilege escalation. The writeup explains the structure of the marshaled data, the unmarshaling process, and potential attack vectors, including bypassing session checks and leveraging the Audio Service.

Description

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.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Google Security Research · textlocalwindows
https://www.exploit-db.com/exploits/45893

This is a detailed technical analysis of CVE-2018-8550, focusing on the unsafe unmarshaling in the DfMarshal COM object, which can lead to privilege escalation. The writeup explains the structure of the marshaled data, the unmarshaling process, and potential attack vectors, including bypassing session checks and leveraging the Audio Service.

Classification
Writeup 100%
Attack Type
Lpe
Complexity
Complex
Reliability
Theoretical
Target: Windows 10 1803 (and potentially earlier versions)
No auth needed
Prerequisites: Access to a vulnerable Windows system · Ability to interact with COM objects · Knowledge of the target process and session
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1042139
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/105805
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45893/

Scores

CVSS v3 7.8
EPSS 0.0330
EPSS Percentile 87.0%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (17)
microsoft/windows_10
microsoft/windows_10 1607
microsoft/windows_10 1703
microsoft/windows_10 1709
microsoft/windows_10 1803
microsoft/windows_10 1809
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_rt_8.1
microsoft/windows_server_2008
... and 7 more
Published Nov 14, 2018
Tracked Since Feb 18, 2026