CVE-2018-0953

HIGH EXPLOITED IN THE WILD

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

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2018-0953 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io). EIP tracks 1 public exploit from researchers including Google Security Research.

AI-analyzed exploit summary This exploit leverages a type confusion vulnerability in ChakraCore's JavascriptNativeFloatArray::SetItem method. By passing a specific magic value, it forces a float array to be converted to a var array, leading to potential memory corruption.

Description

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge, aka "Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-0945, CVE-2018-0946, CVE-2018-0951, CVE-2018-0954, CVE-2018-0955, CVE-2018-1022, CVE-2018-8114, CVE-2018-8122, CVE-2018-8128, CVE-2018-8137, CVE-2018-8139.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/44694

This exploit leverages a type confusion vulnerability in ChakraCore's JavascriptNativeFloatArray::SetItem method. By passing a specific magic value, it forces a float array to be converted to a var array, leading to potential memory corruption.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft ChakraCore (Edge/IE JavaScript Engine)
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
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/103990
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/44694/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040844

Scores

CVSS v3 7.5
EPSS 0.6691
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

VulnCheck KEV 2021-08-17
InTheWild.io 2021-08-17
CWE
CWE-787
Status published
Products (2)
microsoft/chakracore < 1.8.3
microsoft/edge
Published May 09, 2018
Tracked Since Feb 18, 2026