CVE-2018-8353

highpriority · attend · 64EPSS 0.673 · 99 %ileexploit · functionalEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · functional

Likely / severe?

67.3% (99th) EPSS

CVSS 7.6 · high

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8355, 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.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

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:H/E:Hsecondary · CVSS-BT (t0sche)

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USprimaryCWE-119US

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-45279Microsoft Windows - JScript RegExp.lastIndex Use-After-Freefunctional · exploit_db
whereisr0da/CVE-2018-8353-POCSimple poc of CVE-2018-8353 Microsoft Scripting Engine Use After FreePoC · poc_in_github

affected products (7)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Microsoft Corp Internet Explorer≤ 9fstec_bduRU
Microsoft Corp Internet Explorer≤ 11fstec_bduRU
Microsoft Corp Internet Explorer≤ 10fstec_bduRU
microsoft internet explorer= 10nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
microsoft internet explorer= 11nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
microsoft internet explorer= 9nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

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

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+12230 more

references (13)

External citations — patches, advisories, analysis.

scry

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