CVE-2018-0891

MEDIUM

Internet Explorer - Information Disclosure via Scripting Engine Memory Handling

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-0891. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit leverages a vulnerability in Internet Explorer's RegExp handling to disclose memory contents. It manipulates RegExp.input and String.prototype.match to trigger memory disclosure or a crash.

Description

ChakraCore, and 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, and Internet Explorer and Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allow information disclosure, due to how the scripting engine handles objects in memory, aka "Scripting Engine Information Disclosure Vulnerability". This CVE ID is unique from CVE-2018-0939.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/44312

This exploit leverages a vulnerability in Internet Explorer's RegExp handling to disclose memory contents. It manipulates RegExp.input and String.prototype.match to trigger memory disclosure or a crash.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Racy
Target: Internet Explorer 11 on Windows 7 64-bit
No auth needed
Prerequisites: Internet Explorer 11 on Windows 7 64-bit with latest patches applied
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/103309
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/44312/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040507

Scores

CVSS v3 4.3
EPSS 0.1474
EPSS Percentile 96.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Details

CWE
CWE-401
Status published
Products (4)
microsoft/edge
microsoft/internet_explorer 9
microsoft/internet_explorer 10
microsoft/internet_explorer 11
Published Mar 14, 2018
Tracked Since Feb 18, 2026