CVE-2019-1019 in the critical feed json
Microsoft Windows Security Feature Bypass Vulnerability
published 2019-06-12 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-9605
- cvss
- 8.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 15.1%
- EPSS 15.1% chance of exploitation in 30 days, percentile 96%
- public exploits
- 1
- Exploit-DB
Summary
A security feature bypass vulnerability exists where a NETLOGON message is able to obtain the session key and sign messages. To exploit this vulnerability, an attacker could send a specially crafted authentication request. An attacker who successfully exploited this vulnerability could access another machine using the original user privileges. The issue has been addressed by changing how NTLM validates network authentication messages.
Patch / fix
Timeline
- Published
- First public exploit (EDB-47115)
Exploit prediction
15.12% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-47115 Microsoft Windows 10.0.17134.648 - HTTP -> SMB NTLM Reflection Leads to Privilege Elevation local, 2019-07-12
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C |
| CNA | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| CNA | 3.0 | 8.5 | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 6.0 | AV:N/AC:M/Au:S/C:P/I:P/A:P |
Affected products
- Microsoft Windows 10 Version 1703
- Microsoft Windows 10 Version 1803
- Microsoft Windows Server, version 1803 (Server Core Installation)
- Microsoft Windows 10 Version 1809
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows 10 Version 1709 for 32-bit Systems
- Microsoft Windows 10 Version 1709
- 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)
- Microsoft Windows 10 Version 1507
- Microsoft Windows 10 Version 1607
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
- Microsoft Windows 7
- Microsoft Windows 7 Service Pack 1
- Microsoft Windows 8.1
- Microsoft Windows Server 2008 Service Pack 2
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
- Microsoft Windows Server 2008 Service Pack 2
- Microsoft Windows Server 2008 R2 Systems Service Pack 1
- Microsoft Windows Server 2008 R2 Service Pack 1
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- Microsoft Windows Server 2012
- Microsoft Windows Server 2012 (Server Core installation)
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2012 R2 (Server Core installation)
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2019-1019
patch, vendor-advisory
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2019-1019
vendor-advisory
-
packetstormsecurity.com
/files/153639/Microsoft-Windows-HTTP-To-SMB-NTLM-Reflection-Privilege-Escalation.html
third-party-advisory
Sources
- CVE List CVE-2019-1019
- NVD CVE-2019-1019
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.