CVE-2018-0866

HIGH

Internet Explorer - Remote Code Execution via Scripting Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-0866. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC demonstrates a use-after-free vulnerability in Internet Explorer 11 (CVE-2018-0866) by manipulating JavaScript string operations and garbage collection to trigger an access violation. The exploit is unreliable but can lead to memory disclosure or potential code execution under specific conditions.

Description

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, and CVE-2018-0861.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmldoswindows
https://www.exploit-db.com/exploits/44153

This PoC demonstrates a use-after-free vulnerability in Internet Explorer 11 (CVE-2018-0866) by manipulating JavaScript string operations and garbage collection to trigger an access violation. The exploit is unreliable but can lead to memory disclosure or potential code execution under specific conditions.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Racy
Target: Internet Explorer 11 on Windows 7 64-bit
No auth needed
Prerequisites: Internet Explorer 11 with specific registry settings (TabProcGrowth=0) and page heap enabled for iexplore.exe
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/103032
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/44153/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040372
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040369

Scores

CVSS v3 7.5
EPSS 0.6682
EPSS Percentile 98.6%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (3)
microsoft/internet_explorer 11
microsoft/internet_explorer 10
microsoft/internet_explorer 9
Published Feb 15, 2018
Tracked Since Feb 18, 2026