CVE-2017-8635

HIGH

Microsoft Internet Explorer and Edge - Remote Code Execution via Scripting Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-8635. PoCs published by Google Security Research.

AI-analyzed exploit summary The exploit leverages a use-after-free vulnerability in Chakra's dictionary object handling, where repeated undeletion of properties leads to memory corruption. The PoC triggers the bug by preventing extensions, deleting properties, and repeatedly reassigning a property to exhaust the deleted property index.

Description

Microsoft browsers 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, 1703, and Windows Server 2016 allow an attacker to execute arbitrary code in the context of the current user due to the way that JavaScript engines render when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8634, CVE-2017-8636, CVE-2017-8638, CVE-2017-8639, CVE-2017-8640, CVE-2017-8641, CVE-2017-8645, CVE-2017-8646, CVE-2017-8647, CVE-2017-8655, CVE-2017-8656, CVE-2017-8657, CVE-2017-8670, CVE-2017-8671, CVE-2017-8672, and CVE-2017-8674.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmldoswindows
https://www.exploit-db.com/exploits/42471

The exploit leverages a use-after-free vulnerability in Chakra's dictionary object handling, where repeated undeletion of properties leads to memory corruption. The PoC triggers the bug by preventing extensions, deleting properties, and repeatedly reassigning a property to exhaust the deleted property index.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft ChakraCore (Edge/IE JavaScript engine)
No auth needed
Prerequisites: Target must execute the JavaScript PoC in a vulnerable ChakraCore environment
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/100055
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039095
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039094
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42471/

Scores

CVSS v3 7.5
EPSS 0.5797
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/edge
microsoft/internet_explorer 10
microsoft/internet_explorer 11
Microsoft Corporation/Microsoft Scripting Engine Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server
Published Aug 08, 2017
Tracked Since Feb 18, 2026