CVE-2014-1766

Microsoft Internet Explorer <11 - Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2014-1766.

AI-analyzed exploit summary This HTML/JavaScript PoC demonstrates a use-after-free vulnerability in Internet Explorer 9/10 (CVE-2014-1766) by triggering a memory corruption in MSHTML!CInput::DoClick. The exploit frees a CFormElement object via innerHTML manipulation while retaining a reference, leading to subsequent memory writes to the freed object.

Description

Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, as demonstrated by Sebastian Apelt and Andreas Schmidt during a Pwn2Own competition at CanSecWest 2014. NOTE: the original disclosure referred to triggering a kernel bug with the Internet Explorer exploit payload, but this ID is not for a kernel vulnerability.

Exploits (1)

exploitdb WORKING POC
htmldoswindows_x86
https://www.exploit-db.com/exploits/34010

This HTML/JavaScript PoC demonstrates a use-after-free vulnerability in Internet Explorer 9/10 (CVE-2014-1766) by triggering a memory corruption in MSHTML!CInput::DoClick. The exploit frees a CFormElement object via innerHTML manipulation while retaining a reference, leading to subsequent memory writes to the freed object.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Internet Explorer 9, 10
No auth needed
Prerequisites: Victim must visit a malicious webpage using Internet Explorer 9 or 10
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (5)

Core 5
Core References
Broken Link, Third Party Advisory x_refsource_misc
http://www.pwn2own.com/2014/03/pwn2own-results-thursday-day-two/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1030370
Third Party Advisory x_refsource_misc
http://twitter.com/thezdi/statuses/444216845734666240
Patch, Vendor Advisory vendor-advisory x_refsource_ms
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-035
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/67518

Scores

EPSS 0.1097
EPSS Percentile 93.6%

Details

CWE
CWE-119
Status published
Products (3)
microsoft/internet_explorer 9
microsoft/internet_explorer 10
microsoft/internet_explorer 11
Published Apr 27, 2014
Tracked Since Feb 18, 2026