CVE-2018-0866 in the critical feed json
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, W…
published 2018-02-15 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-1661
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 43.6%
- EPSS 43.6% chance of exploitation in 30 days, percentile 98%
- public exploits
- 1
- Exploit-DB
Summary
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.
Patch / fix
Timeline
- Published
- First public exploit (EDB-44153)
Exploit prediction
43.64% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-44153 Microsoft Internet Explorer 11 - 'Js::RegexHelper::RegexReplace' Use-After-Free dos, 2018-02-20
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Microsoft Corporation Internet Explorer
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2018-0866
patch, vendor-advisory
-
exploit-db.com
/exploits/44153/
exploit, third-party-advisory, vdb-entry
-
securityfocus.com
/bid/103032
vdb-entry, third-party-advisory
-
securitytracker.com
/id/1040372
vdb-entry, third-party-advisory
-
securitytracker.com
/id/1040369
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-0866
- NVD CVE-2018-0866
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.