Microsoft Internet Explorer 11 - Js::RegexHelper::RegexReplace Use-After-Free Exploit

zdt · 2018-02-20

Description

Microsoft Internet Explorer 11 Js RegexHelper RegexReplace Use-After-Free Exploit for Windows Platfor

Affected Microsoft Internet Explorer versions

Microsoft Internet Explorer= 11

All known vulnerabilities by product

Internet Explorer

CVSS 9.3 for CVE-2018-0866

9.3

HIGH SEVERITY

VectorAV:NETWORK/AC:MEDIUM/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/

EPSS Score

43.6%higher than 98.6% of all CVEs

Updated 2026-08-25

Exploit Details

Modified:2018-02-20 00:00

Last Seen:2018-04-14 21:56

Reporter:Google Security Research

Tags

microsoft internet explorer 11regexhelperregexreplaceuse-after-freeexploitwindows platformcategory dosproof of concept

Other exploits for CVE-2018-0866

IE11: Use-after-free in Js::RegexHelper::RegexReplace(CVE-2018-0866)

2018-02-24 RootSEEBUG

IE11: Use-after-free in String.lastIndexOf(CVE-2018-0866)

2018-02-24 RootSEEBUG

Microsoft IE11 Js::RegexHelper::RegexReplace Use-After-Free

2018-02-22 Ivan FratricPACKETSTORM

Microsoft Internet Explorer 11 - 'Js::RegexHelper::RegexReplace' Use-After-Free

2018-02-20 Google Security ResearchEXPLOITDB

Exploit Code

MARKDOWN2 lines

## https://sploitus.com/exploit?id=1337DAY-ID-29856
Exploit for windows platform in category dos / poc