HIGH
Microsoft Windows Security Feature Bypass Vulnerability
Published Jun 12, 2019
8.5
HIGHCVSS 3.1
EPSS 15.12%
Description
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.
Affected products
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- Version 10.0.10240.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.14393.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version 10.0.17763.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 6.1.0StatusaffectedConstraints<publication
- Version
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- Version 6.1.0StatusaffectedConstraints<publication
- Version
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- Version 6.3.0StatusaffectedConstraints<publication
- Version
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- Version 6.0.6003.0StatusaffectedConstraints<publication
- Version
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- Version 6.1.7601.0StatusaffectedConstraints<publication
- Version
- Vendor Microsoft Product Windows Server 2008 R2 Service Pack 1 (Server Core installation) Defaultn/a
- Version 6.1.7601.0StatusaffectedConstraints<publication
- Version
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- Version 6.1.0StatusaffectedConstraints<publication
- Version
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- Version 6.0.0StatusaffectedConstraints<publication
- Version 6.0.6003.0StatusaffectedConstraints<publication
- Version
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- Version 6.0.6003.0StatusaffectedConstraints<publication
- Version
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- Version 6.2.9200.0StatusaffectedConstraints<publication
- Version
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- Version 6.2.9200.0StatusaffectedConstraints<publication
- Version
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- Version 6.3.9600.0StatusaffectedConstraints<publication
- Version
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- Version 6.3.9600.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.14393.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.14393.0StatusaffectedConstraints<publication
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.17763.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
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- Version 10.0.0StatusaffectedConstraints<publication
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 1507 | n/a |
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| Microsoft | Windows 10 Version 1607 | n/a |
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| Microsoft | Windows 10 Version 1703 | n/a |
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| Microsoft | Windows 10 Version 1709 | n/a |
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| Microsoft | Windows 10 Version 1709 for 32-bit Systems | n/a |
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| Microsoft | Windows 10 Version 1803 | n/a |
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| Microsoft | Windows 10 Version 1809 | n/a |
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| Microsoft | Windows 10 Version 1903 for 32-bit Systems | n/a |
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| Microsoft | Windows 10 Version 1903 for ARM64-based Systems | n/a |
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| Microsoft | Windows 10 Version 1903 for x64-based Systems | n/a |
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| Microsoft | Windows 7 | n/a |
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| Microsoft | Windows 7 Service Pack 1 | n/a |
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| Microsoft | Windows 8.1 | n/a |
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| Microsoft | Windows Server 2008 Service Pack 2 | n/a |
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| Microsoft | Windows Server 2008 R2 Service Pack 1 | n/a |
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| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2008 R2 Systems Service Pack 1 | n/a |
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| Microsoft | Windows Server 2008 Service Pack 2 | n/a |
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| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2012 | n/a |
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| Microsoft | Windows Server 2012 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2012 R2 | n/a |
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| Microsoft | Windows Server 2012 R2 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2016 | n/a |
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| Microsoft | Windows Server 2016 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2019 | n/a |
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| Microsoft | Windows Server 2019 (Server Core installation) | n/a |
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| Microsoft | Windows Server, version 1803 (Server Core Installation) | n/a |
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| Microsoft | Windows Server, version 1903 (Server Core installation) | n/a |
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OR
- n/a
- 1607
- 1703
- 1709
- 1803
- 1809
- 1903
- n/a
- n/a
- n/a
- n/a
- r2
- r2
- n/a
- r2
- n/a
- 1803
- 1903
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
8.5 HIGH CVE.org
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
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
Exploit Maturity Proof of Concept
1 other source (NVD) ▾
8.5 HIGH NVD
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
8.5 HIGH NVD
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
6.0 MEDIUM NVD
AV:N/AC:M/Au:S/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication Single
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
15.12% 0.15115
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.15115
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 15.12% (0.15115) | 96.64th | v5 (v2026.06.15) |
| Aug 24, 2026 | 15.12% (0.15115) | 96.47th | v5 (v2026.06.15) |
| Jul 24, 2026 | 13.60% (0.13598) | 96.06th | v5 (v2026.06.15) |
| Jun 21, 2026 | 15.24% (0.15235) | 96.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.84% (0.13844) | 96.03th | v5 (v2026.06.15) |
| Dec 7, 2025 | 3.45% (0.03452) | 87.08th | v4 (v2025.03.14) |
| Oct 9, 2025 | 2.19% (0.02187) | 83.73th | v4 (v2025.03.14) |
| May 21, 2025 | 4.67% (0.04674) | 88.77th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.03% (0.02026) | 82.17th | v4 (v2025.03.14) |
| Mar 29, 2025 | 11.89% (0.11890) | 89.54th | v4 (v2025.03.14) |
| Mar 28, 2025 | 2.03% (0.02026) | 82.19th | v4 (v2025.03.14) |
| Mar 27, 2025 | 11.89% (0.11890) | 92.71th | v4 (v2025.03.14) |
| Mar 20, 2025 | 2.03% (0.02026) | 82.27th | v4 (v2025.03.14) |
| Mar 19, 2025 | 11.89% (0.11890) | 92.84th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.03% (0.02026) | 82.58th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.96% (0.00959) | 83.94th | v3 (v2023.03.01) |
| Jun 23, 2024 | 0.94% (0.00942) | 83.17th | v3 (v2023.03.01) |
| Feb 7, 2024 | 0.78% (0.00783) | 79.54th | v3 (v2023.03.01) |
| Oct 24, 2023 | 0.68% (0.00679) | 77.66th | v3 (v2023.03.01) |
| Apr 1, 2023 | 0.48% (0.00479) | 72.15th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.54% (0.00542) | 73.82th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.86% (0.06857) | 92.17th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.86% (0.06857) | 91.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.86% (0.06857) | 79.65th | v2 (v2022.01.01) |
| Feb 3, 2022 | 24.37% (0.24372) | 95.46th | v1 |
| Jan 6, 2022 | 24.37% (0.24372) | 95.40th | v1 |
| Sep 1, 2021 | 24.37% (0.24372) | 98.13th | v1 |
| Apr 14, 2021 | 24.37% (0.24372) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://packetstormsecurity.com/files/153639/Microsoft-Windows-HTTP-To-SMB-NTLM-Reflection-Privilege-Escalation.html Third Party Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1019 vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1019 PatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/153639/Microsoft-Windows-HTTP-To-SMB-NTLM-Reflection-Privilege-Escalation.html | Third Party Advisory | |
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1019 | vendor-advisory | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1019 | PatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Jun 12, 2019
Updated May 20, 2025
Reserved Nov 26, 2018
Link CVE-2019-1019
CISA Vulnrichment
Updated n/a