CVE-2018-0866
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 43.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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
- 7.5 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 43.64% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 20 February 2018
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- microsoft/internet explorer
- Source
- secure@microsoft.com
EPSS moved from 41.7% on 21 September 2026 to 43.6% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.securityfocus.com/bid/103032Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040369Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040372Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0866Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/44153/Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/103032Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040369Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040372Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0866Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/44153/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.