THREATPORT/VULNERABILITY/CVE-2018-8256
HIGH SEVERITY

CVE-2018-8256

Microsoft.Powershell.Archive vulnerability

CVSS
8.8
EPSS
22.6%
EPSS pct
97th
Exploited
No known
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.
Affected vendor
Microsoft
Affected product
Microsoft.Powershell.Archive
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2018-11-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 22.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2018-8256

  • Confirm whether Microsoft Microsoft.Powershell.Archive is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-8256.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-8256

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-8256 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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