How severe is CVE-2018-8414?

CVE-2018-8414 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8414 being actively exploited?

Yes. CVE-2018-8414 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-8414?

CVE-2018-8414 primarily affects Microsoft Windows 10 1703. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8414?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-8414 have an EU (EUVD) identifier?

Yes. CVE-2018-8414 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-20051. It is also flagged as exploited in the EUVD (since 2022-03-25).

When was CVE-2018-8414 published?

CVE-2018-8414 was published on 2018-08-15 and last updated on 2026-06-17.

CVE-2018-8414

CVE-2018-8414 is a high-severity vulnerability in Microsoft Windows 10 1703 with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-25). The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.3
EPSS exploit prediction: 74% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-25)
EU (EUVD) id: EUVD-2018-20051
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-25)
Weakness: CWE-20
Affected product: Microsoft Windows 10 1703
Published: 2018-08-15
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists when the Windows Shell does not properly validate file paths, aka "Windows Shell Remote Code Execution Vulnerability." This affects Windows 10 Servers, Windows 10.

Frequently asked questions

What is CVE-2018-8414?: A remote code execution vulnerability exists when the Windows Shell does not properly validate file paths, aka "Windows Shell Remote Code Execution Vulnerability." This affects Windows 10 Servers, Windows 10.
How severe is CVE-2018-8414?: CVE-2018-8414 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8414 being actively exploited?: Yes. CVE-2018-8414 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-8414?: CVE-2018-8414 primarily affects Microsoft Windows 10 1703. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8414?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-8414 have an EU (EUVD) identifier?: Yes. CVE-2018-8414 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-20051. It is also flagged as exploited in the EUVD (since 2022-03-25).
When was CVE-2018-8414 published?: CVE-2018-8414 was published on 2018-08-15 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_1709:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_1803:-:*:*:*:*:*:x64:*

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