CVE-2017-11870

HIGH

ChakraCore and Microsoft Edge - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-11870. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a type confusion vulnerability in Microsoft's Chakra JavaScript engine (CVE-2017-11870) by redefining a formal parameter within a nested block, leading to incorrect JIT optimization and potential memory corruption.

Description

ChakraCore and Microsoft Edge in Windows 10 1703, 1709, and Windows Server, version 1709 allows an attacker to gain the same user rights as the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11871, and CVE-2017-11873.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/43182

This PoC exploits a type confusion vulnerability in Microsoft's Chakra JavaScript engine (CVE-2017-11870) by redefining a formal parameter within a nested block, leading to incorrect JIT optimization and potential memory corruption.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Edge (Chakra JavaScript engine)
No auth needed
Prerequisites: Target must visit a malicious webpage or execute the script in a vulnerable environment
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/101731
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/43182/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039780

Scores

CVSS v3 7.5
EPSS 0.8040
EPSS Percentile 99.2%
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/chakracore
microsoft/edge
Microsoft Corporation/ChakraCore, Microsoft Edge Windows 10 1703, 1709, and Windows Server, version 1709.
nuget/Microsoft.ChakraCore 0 - 1.7.4NuGet
Published Nov 15, 2017
Tracked Since Feb 18, 2026