CVE-2017-11861

HIGH

Microsoft Edge - Memory Corruption in Scripting Engine

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-11861. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits an integer overflow vulnerability in the Microsoft Office Equation Editor (EQNEDT32.EXE) by triggering a bounds check failure in a 64-bit system, leading to memory corruption. The code demonstrates the issue by attempting to write to a large Uint32Array, which can cause a crash or arbitrary code execution.

Description

Microsoft Edge in Windows 10 1607, 1703, 1709, Windows Server 2016 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-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11870, CVE-2017-11871, and CVE-2017-11873.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/43153

This PoC exploits an integer overflow vulnerability in the Microsoft Office Equation Editor (EQNEDT32.EXE) by triggering a bounds check failure in a 64-bit system, leading to memory corruption. The code demonstrates the issue by attempting to write to a large Uint32Array, which can cause a crash or arbitrary code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Office Equation Editor (EQNEDT32.EXE) in Office 2007, 2010, 2013, and 2016
No auth needed
Prerequisites: Victim must open a malicious Office document containing the exploit
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/43153/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039780
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/101723

Scores

CVSS v3 7.5
EPSS 0.7616
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 (3)
microsoft/chakracore
microsoft/edge
Microsoft Corporation/ChakraCore, Microsoft Edge Windows 10 1607, 1703, 1709, Windows Server 2016 and Windows Server, version 1709.
Published Nov 15, 2017
Tracked Since Feb 18, 2026