Security Resilience

CVE-2018-8414

Microsoft Windows 10 1703

CISA KEVActive ExploitationEUVD Exploited
Published
15 August 2018
Modified
28 October 2025
KEV Added
25 March 2022
Patch / advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.73 99.4th percentile
Risk Priority 90 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2018-8414 is a high-severity Improper Input Validation (CWE-20) vulnerability in Microsoft Windows 10 1703. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 0.6% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

A remote code execution vulnerability exists in the Windows Shell when file paths are not properly validated. The flaw, tracked as CVE-2018-8414, affects Windows 10 and Windows 10 Server systems and carries a CVSS 3.1 base score of 8.8. It is also identified under CWE-20 for improper input validation.

An attacker can exploit the issue over a network without authentication by supplying a crafted path that triggers code execution once a user interacts with the malicious content. Successful exploitation grants the attacker full control over confidentiality, integrity, and availability on the target system.

Microsoft published an advisory at https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8414 along with related tracking entries on SecurityFocus and SecurityTracker that direct administrators to available updates and configuration guidance. No public details on observed in-the-wild exploitation are included in the provided references.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

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.

CWE(s)
KEV Date Added
25 March 2022

Related Threats

CVEs Like This One

CVE-2018-8406Same product: Microsoft Windows 10 1703both on KEV
CVE-2019-0604Same vendor: Microsoftboth on KEV
CVE-2025-32706Same vendor: Microsoftboth on KEV
CVE-2020-1350Same vendor: Microsoftboth on KEV
CVE-2026-32201Same vendor: Microsoftboth on KEV
CVE-2023-36761Same vendor: Microsoftboth on KEV
CVE-2012-0151Same vendor: Microsoftboth on KEV
CVE-2024-30040Same vendor: Microsoftboth on KEV
CVE-2020-1040Same vendor: Microsoftboth on KEV
CVE-2023-36563Same vendor: Microsoftboth on KEV

Affected Assets

microsoft
windows 10 1703
all versions
microsoft
windows 10 1709
all versions
microsoft
windows 10 1803
all versions
microsoft
windows server 1709
all versions
microsoft
windows server 1803
all versions

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-20

Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.

addresses: CWE-20

Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.

addresses: CWE-20

Directly implements checks on information inputs to reject invalid data before processing.

addresses: CWE-20

Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

blocks

A.8.25 mandates security requirements, secure coding guidelines, checkpoints, testing (incl. code scans) and developer training in the SDLC, which reaches a slice of input validation defects but leaves the majority (incomplete enforcement, second-order inputs, parser differentials, post-validation canonicalization) unaddressed as in the SA-3 and A.8.28 anchors.

blocks

Mandating input controls that include integrity checks and input validation ensures that untrusted data is examined before use, blocking the root cause of many injection and malformed-data weaknesses.

blocks

Security-by-design principles explicitly call for data validation and sanitization at every layer, reducing the chance that malformed or malicious input will be processed without scrutiny.

prevents

Requiring language-specific secure coding standards, peer review, SAST and documented mitigation of common programming errors forces validation of all inputs before they are trusted.

finds

Testing against a defined set of requirements and using code review plus vulnerability scanning forces validation of inputs and handling of unanticipated conditions, reducing the chance that malformed data will be accepted.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-20, a class-level weakness, and none of its children carries one either.

References