An elevation of privilege vulnerability exists in the way that the StartTileData.dll handles file creation in protected locations, aka 'Win…

published 2019-11-12 6y ago modified 2026-06-17 4mo ago also EUVD-2019-9980

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

An elevation of privilege vulnerability exists in the way that the StartTileData.dll handles file creation in protected locations, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1420, CVE-2019-1422.

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1423 advisory

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Exploit prediction

1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	4.6	AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

Microsoft Windows 10 Version 1903 for 32-bit Systems
Microsoft Windows 10 Version 1903 for x64-based Systems
Microsoft Windows 10 Version 1903 for ARM64-based Systems
Microsoft Windows Server, version 1903 (Server Core installation)

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2019-1423
patch, vendor-advisory
zerodayinitiative.com /advisories/ZDI-19-978/
third-party-advisory

Sources

CVE List CVE-2019-1423
NVD CVE-2019-1423

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