Is CVE-2019-1388 being actively exploited?

Yes. CVE-2019-1388 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on April 7, 2023.

What is the CVSS score for CVE-2019-1388?

CVE-2019-1388 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2019-1388

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 8.6%EU EUVD: exploited

An elevation of privilege vulnerability exists in the Windows Certificate Dialog when it does not properly enforce user privileges, aka 'Windows Certificate Dialog Elevation of Privilege Vulnerability'.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-269
EPSS score: 8.6% (95th percentile)
In CISA KEV: Yes, added April 7, 2023
In EU EUVD: Yes (EUVD-2019-9945)
Published: November 12, 2019
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows Certificate Dialog Privilege Escalation Vulnerability

Added to the KEV catalog on April 7, 2023; federal remediation due April 28, 2023. Known to be used in ransomware campaigns.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2019-9945 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1507
microsoft / windows 10 1507
microsoft / windows 10 1607
microsoft / windows 10 1607
microsoft / windows 10 1709
microsoft / windows 10 1709
microsoft / windows 10 1709
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 7
microsoft / windows 8.1
microsoft / windows rt 8.1
microsoft / windows server 1903
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2012
microsoft / windows server 2012
microsoft / windows server 2016
microsoft / windows server 2016
microsoft / windows server 2019

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1388(Patch, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1388(US Government Resource)
https://www.zerodayinitiative.com/advisories/ZDI-19-975/(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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