CVE-2017-8618

HIGH

Internet Explorer - Memory Corruption in Scripting Engine

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-8618. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit leverages a type confusion vulnerability in VBScript's arithmetic operations, specifically in the VbsVarMod function, to achieve an out-of-bounds access in the result type lookup table. This can lead to information leakage or potential RCE depending on the resulting type confusion.

Description

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 Internet Explorer in the way affected Microsoft scripting engines render when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-8596, CVE-2017-8610, CVE-2017-8601, CVE-2017-8603, CVE-2017-8604, CVE-2017-8605, CVE-2017-8606, CVE-2017-8607, CVE-2017-8608, CVE-2017-8619, CVE-2017-9598 and CVE-2017-8609.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmldoswindows
https://www.exploit-db.com/exploits/42337

This exploit leverages a type confusion vulnerability in VBScript's arithmetic operations, specifically in the VbsVarMod function, to achieve an out-of-bounds access in the result type lookup table. This can lead to information leakage or potential RCE depending on the resulting type confusion.

Classification
Working Poc 95%
Attack Type
Rce | Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Microsoft VBScript (vbscript.dll) in Internet Explorer 11
No auth needed
Prerequisites: Target must be using a vulnerable version of VBScript in Internet Explorer
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1038848
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42337/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/99399

Scores

CVSS v3 7.5
EPSS 0.5833
EPSS Percentile 98.2%
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-119
Status published
Products (4)
microsoft/internet_explorer 11
microsoft/internet_explorer 10
microsoft/internet_explorer 9
Microsoft Corporation/Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 Internet Explorer
Published Jul 11, 2017
Tracked Since Feb 18, 2026