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Vulnerability record · CVE-2018-0866 · published 15 February 2018

CVE-2018-0866: Microsoft internet explorer out-of-bounds write vulnerability

Microsoft · Internet Explorer

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.

7.5 CVSS 3.0 High EPSS 44% · top 1.3% CWE-787 · Out-of-bounds write
7.5CVSS 3.0 base score, v2 9.3
44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/103032 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040369 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040372 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0866 PatchVendor Advisory
https://www.exploit-db.com/exploits/44153/ Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/103032 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040369 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040372 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0866 PatchVendor Advisory
https://www.exploit-db.com/exploits/44153/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-0866), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.