CVE-2017-8657

HIGH

Microsoft Edge - Remote Code Execution via Scripting Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-8657. PoCs published by Google Security Research.

AI-analyzed exploit summary This JavaScript PoC exploits an out-of-bounds access vulnerability in ChakraCore's delayed compilation, leading to a potential exploitable condition. It triggers an assertion failure in debug builds and demonstrates the issue using a minimized test case from the V8 repository.

Description

Microsoft Edge in Microsoft Windows 10 1511, 1607, 1703, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user due to the way that Microsoft browser JavaScript engines render content when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8634, CVE-2017-8635, 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-2017-8670, CVE-2017-8671, CVE-2017-8672, and CVE-2017-8674.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/42481

This JavaScript PoC exploits an out-of-bounds access vulnerability in ChakraCore's delayed compilation, leading to a potential exploitable condition. It triggers an assertion failure in debug builds and demonstrates the issue using a minimized test case from the V8 repository.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: ChakraCore (Microsoft Edge)
No auth needed
Prerequisites: Target must be running a vulnerable version of ChakraCore
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42481/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/100035
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039095

Scores

CVSS v3 7.5
EPSS 0.5456
EPSS Percentile 98.9%
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 (2)
microsoft/edge
Microsoft Corporation/Microsoft Scripting Engine Microsoft Windows 10 1511, 1607, 1703, and Windows Server 2016.
Published Aug 08, 2017
Tracked Since Feb 18, 2026