How severe is CVE-2018-8327?

CVE-2018-8327 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8327 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8327?

CVE-2018-8327 primarily affects Microsoft Powershell. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8327?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-8327 published?

CVE-2018-8327 was published on 2018-07-11 and last updated on 2026-06-17.

CVE-2018-8327

CVE-2018-8327 is a critical-severity vulnerability in Microsoft Powershell with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Powershell
Published: 2018-07-11
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists in PowerShell Editor Services, aka "PowerShell Editor Services Remote Code Execution Vulnerability." This affects PowerShell Editor, PowerShell Extension.

Frequently asked questions

What is CVE-2018-8327?: A remote code execution vulnerability exists in PowerShell Editor Services, aka "PowerShell Editor Services Remote Code Execution Vulnerability." This affects PowerShell Editor, PowerShell Extension.
How severe is CVE-2018-8327?: CVE-2018-8327 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8327 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8327?: CVE-2018-8327 primarily affects Microsoft Powershell. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8327?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-8327 published?: CVE-2018-8327 was published on 2018-07-11 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:microsoft:powershell:*:*:*:*:*:visual_studio_code:*:*
cpe:2.3:a:microsoft:powershell_editor_services:*:*:*:*:*:*:*:*

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