VulnerabilityModified

CVE-2018-8256

HIGH 8.8EPSS 22.6%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 22.6%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

Description

A remote code execution vulnerability exists when PowerShell improperly handles specially crafted files, aka "Microsoft PowerShell Remote Code Execution Vulnerability." This affects Windows RT 8.1, PowerShell Core 6.0, Microsoft.PowerShell.Archive 1.2.2.0, Windows Server 2016, Windows Server 2012, Windows Server 2008 R2, Windows Server 2019, Windows 7, Windows Server 2012 R2, PowerShell Core 6.1, Windows 10 Servers, Windows 10, Windows 8.1.

CVSS 3.0: 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS: 22.64% probability · 98th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Affected: microsoft/microsoft.powershell.archive · microsoft/powershell core · microsoft/windows 10 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019
Source: secure@microsoft.com

EPSS trend

EPSS moved from 20.4% on 21 September 2026 to 22.6% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

http://www.securityfocus.com/bid/105781Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042108Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8256Patch, Vendor Advisory
http://www.securityfocus.com/bid/105781Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042108Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8256Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.