CVE-2018-0866

highpriority · attend · 55EPSS 0.436 · 99 %ileexploit · functionalEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

43.6% (99th) EPSS

CVSS 9.3 · high

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, and CVE-2018-0861.

cvss

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

9.3

010

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

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · 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)

v3.17.5highAV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-119US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-44153Microsoft Internet Explorer 11 - 'Js::RegexHelper::RegexReplace' Use-After-Freefunctional · exploit_db

affected products (9)

Products and version ranges known to be affected.

Microsoft Corporation Internet Explorer≤ Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016.enisa_euvdEU
Microsoft Corp Internet Explorer≤ 9fstec_bduRU
Microsoft Corp Internet Explorer≤ 11fstec_bduRU
Microsoft Corp Internet Explorer≤ 10fstec_bduRU
ООО "Открытая мобильная платформа" Sailfish Browserall versionsfstec_bduRU
ООО "Открытая мобильная платформа" ОС Аврора≤ 3.2.2fstec_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 2018-02-15modified 2026-06-17

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Related entries.

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+16123 more

references (15)

External citations — patches, advisories, analysis.

scry

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