CVE-2018-8355

highpriority · attend · 64EPSS 0.679 · 99 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

67.9% (99th) EPSS

CVSS 7.6 · high

Is it mine?

34 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · osv

EPSS · scored 2026-10-27

A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge. This CVE ID is unique from CVE-2018-8353, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.

cvss

Technical severity, 0–10. One row per scoring source.

7.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.6highAV:N/AC:H/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 4.9 · impact 10

v3.07.5highCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.6 · impact 5.9

v3.07.5highCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · OSV

v3.07.5highCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-787US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-45432Microsoft Edge Chakra JIT - 'localeCompare' Type Confusionfunctional · exploit_db

affected products (34)

Products and version ranges known to be affected.

Microsoft ChakraCore≤ ChakraCoreenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows RT 8.1enisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1607 for x64-based Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows Server 2008 R2 for x64-based Systems Service Pack 1enisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 7 for x64-based Systems Service Pack 1enisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 8.1 for x64-based systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1803 for x64-based Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 for 32-bit Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1703 for x64-based Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1709 for x64-based Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 8.1 for 32-bit systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows Server 2016enisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1607 for 32-bit Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 for x64-based Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1709 for 32-bit Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1803 for 32-bit Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows Server 2012 R2enisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 10 Version 1703 for 32-bit Systemsenisa_euvdEU
Microsoft Internet Explorer 11≤ Windows 7 for 32-bit Systems Service Pack 1enisa_euvdEU
Microsoft Microsoft Edge≤ Windows 10 Version 1709 for 32-bit Systemsenisa_euvdEU

showing 20 of 34

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-h8jq-5737-hpcfChakraCore RCE Vulnerability2022-05-13ghsa · osvUS
A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge. This CVE ID is unique from CVE-2018-8353, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv NVD CVE.org MITRE

published 2018-08-15modified 2026-06-17

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+16120 more

references (13)

External citations — patches, advisories, analysis.

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