CVE-2019-0543
HighExploitedPublic exploitAn elevation of privilege vulnerability exists when Windows improperly handles authentication requests, aka "Microsoft Windows Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows…
Published Jan 8, 2019 · Updated Jan 14, 2026
Key Facts
Patch immediately- CVE-2019-0543 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 10 1507 (Microsoft), Windows 10 1607 (Microsoft), Windows 10 1703 (Microsoft) and 12 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 15, 2022 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 4.7% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
4.7%
Higher than 91.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-0543 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An elevation of privilege vulnerability exists when Windows improperly handles authentication requests, aka "Microsoft Windows Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 15, 2022 | Apr 5, 2022 | Known |
| Industry KEV feed | Mar 15, 2022 | Apr 5, 2022 | Known |
| CIRCL KEV | Mar 15, 2022 | Apr 5, 2022 | Known |
| ENISA EUVD | Mar 15, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
25 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1507Microsoft | See advisory | n/a |
| Windows 10 1607Microsoft | See advisory | n/a |
| Windows 10 1703Microsoft | See advisory | n/a |
| Windows 10 1709Microsoft | See advisory | n/a |
| Windows 10 1803Microsoft | See advisory | n/a |
Timeline
Publicly disclosed
Jan 8, 2019
Added to CISA KEV
Mar 15, 2022
Added to Industry KEV feed
Mar 15, 2022
Added to CIRCL KEV
Mar 15, 2022
Added to ENISA EUVD
Mar 15, 2022
Last updated
Jan 14, 2026
Weakness Type
- CWE-287 Improper Authentication
References
- advisory106408
- patchhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0543
- exploitVulnCheck exploitation report
- exploitExploitDB-46156
- exploit46156
FAQ
Common Questions.
An elevation of privilege vulnerability exists when Windows improperly handles authentication requests, aka "Microsoft Windows Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Serve…
Affected: Windows 10 1507 (Microsoft); Windows 10 1607 (Microsoft); Windows 10 1703 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 15, 2022 and is known to be used in ransomware campaigns.
Yes. It was added on Mar 15, 2022 with a federal remediation due date of Apr 5, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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