CVE-2016-3247

HIGH

Microsoft Edge and Internet Explorer 11 - Remote Code Execution or Denial of Service via Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2016-3247. PoCs published by Skylined.

AI-analyzed exploit summary This exploit demonstrates an integer underflow in Microsoft Edge's CTextExtractor::GetBlockText, leading to an out-of-bounds read. The PoC uses a heap spray technique to allocate memory at a specific offset to prevent a crash, proving the vulnerability's exploitability.

Description

Microsoft Internet Explorer 11 and Microsoft Edge allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Microsoft Browser Memory Corruption Vulnerability."

Exploits (1)

exploitdb WORKING POC VERIFIED
by Skylined · htmldoswindows
https://www.exploit-db.com/exploits/40797

This exploit demonstrates an integer underflow in Microsoft Edge's CTextExtractor::GetBlockText, leading to an out-of-bounds read. The PoC uses a heap spray technique to allocate memory at a specific offset to prevent a crash, proving the vulnerability's exploitability.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Complex
Reliability
Theoretical
Target: Microsoft Edge 11.0.10240.16384
No auth needed
Prerequisites: Target must visit a specially crafted web page
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (9)

Core 9
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1036789
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/92828
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/539779/100/0/threaded
Various Sources x_refsource_misc
http://blog.skylined.nl/20161118002.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1036788
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/40797/
Mailing List mailing-list x_refsource_fulldisc
http://seclists.org/fulldisclosure/2016/Nov/111

Scores

CVSS v3 7.5
EPSS 0.5079
EPSS Percentile 97.9%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

Status published
Products (2)
microsoft/edge
microsoft/internet_explorer 11
Published Sep 14, 2016
Tracked Since Feb 18, 2026