CRITICAL
An elevation of privilege vulnerability exists when Microsoft IIS Server fails to check the length of a buffer prior to copying memory to it.An attacker who successfully exploited this vulnerability can allow an unprivileged function ran by the user to execute code in the context of NT AUTHORITY\system escaping the Sandbox.The security update addresses the vulnerability by correcting how Microsoft IIS Server sanitizes web requests., aka 'Microsoft IIS Server Elevation of Privilege Vulnerability'
Published Oct 10, 2019
9.9
CRITICALCVSS 3.1
EPSS 4.35%
Description
An elevation of privilege vulnerability exists when Microsoft IIS Server fails to check the length of a buffer prior to copying memory to it.An attacker who successfully exploited this vulnerability can allow an unprivileged function ran by the user to execute code in the context of NT AUTHORITY\system escaping the Sandbox.The security update addresses the vulnerability by correcting how Microsoft IIS Server sanitizes web requests., aka 'Microsoft IIS Server Elevation of Privilege Vulnerability'.
Affected products
-
- Version 10 Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version 10 Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version 10 Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version 10 Version 1803 for ARM64-based SystemsStatusaffectedConstraints-
- Version 10 Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version 10 Version 1809 for 32-bit SystemsStatusaffectedConstraints-
- Version 10 Version 1809 for ARM64-based SystemsStatusaffectedConstraints-
- Version 10 Version 1809 for x64-based SystemsStatusaffectedConstraints-
- Version 7 for 32-bit Systems Service Pack 1StatusaffectedConstraints-
- Version 7 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 8.1 for 32-bit systemsStatusaffectedConstraints-
- Version 8.1 for x64-based systemsStatusaffectedConstraints-
- Version RT 8.1StatusaffectedConstraints-
- Version
-
- Version unspecifiedStatusaffectedConstraints-
- Version
-
- Version unspecifiedStatusaffectedConstraints-
- Version
-
- Version unspecifiedStatusaffectedConstraints-
- Version
-
- Version 2008 R2 for Itanium-Based Systems Service Pack 1StatusaffectedConstraints-
- Version 2008 R2 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 2008 R2 for x64-based Systems Service Pack 1 (Core installation)StatusaffectedConstraints-
- Version 2008 for 32-bit Systems Service Pack 2StatusaffectedConstraints-
- Version 2008 for 32-bit Systems Service Pack 2 (Core installation)StatusaffectedConstraints-
- Version 2008 for Itanium-Based Systems Service Pack 2StatusaffectedConstraints-
- Version 2008 for x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version 2008 for x64-based Systems Service Pack 2 (Core installation)StatusaffectedConstraints-
- Version 2012StatusaffectedConstraints-
- Version 2012 (Core installation)StatusaffectedConstraints-
- Version 2012 R2StatusaffectedConstraints-
- Version 2012 R2 (Core installation)StatusaffectedConstraints-
- Version 2016StatusaffectedConstraints-
- Version 2016 (Core installation)StatusaffectedConstraints-
- Version 2019StatusaffectedConstraints-
- Version 2019 (Core installation)StatusaffectedConstraints-
- Version version 1803 (Core Installation)StatusaffectedConstraints-
- Version
-
- Version unspecifiedStatusaffectedConstraints-
- 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 | n/a |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Version 1903 for 32-bit Systems | n/a |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems | n/a |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Version 1903 for x64-based Systems | n/a |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Microsoft | Windows Server | n/a |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Microsoft | Windows Server, version 1903 (Server Core installation) | n/a |
|
OR
- 1607
- 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.
9.9 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
9.0 HIGH NVD
AV:N/AC:L/Au:S/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.35% 0.04352
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.04352
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 (30 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.35% (0.04352) | 90.94th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.06% (0.04064) | 89.31th | v5 (v2026.06.15) |
| Feb 1, 2026 | 1.50% (0.01502) | 80.87th | v4 (v2025.03.14) |
| Oct 4, 2025 | 2.53% (0.02534) | 84.89th | v4 (v2025.03.14) |
| Oct 1, 2025 | 1.50% (0.01501) | 80.57th | v4 (v2025.03.14) |
| Sep 5, 2025 | 2.53% (0.02534) | 84.89th | v4 (v2025.03.14) |
| Sep 1, 2025 | 1.50% (0.01501) | 80.50th | v4 (v2025.03.14) |
| Aug 4, 2025 | 2.53% (0.02534) | 84.85th | v4 (v2025.03.14) |
| Aug 1, 2025 | 1.50% (0.01501) | 80.47th | v4 (v2025.03.14) |
| Jul 4, 2025 | 2.53% (0.02534) | 84.81th | v4 (v2025.03.14) |
| Jul 1, 2025 | 1.50% (0.01501) | 80.34th | v4 (v2025.03.14) |
| Jun 4, 2025 | 2.53% (0.02534) | 84.68th | v4 (v2025.03.14) |
| Jun 1, 2025 | 1.50% (0.01501) | 80.28th | v4 (v2025.03.14) |
| May 4, 2025 | 2.53% (0.02534) | 84.58th | v4 (v2025.03.14) |
| May 1, 2025 | 1.50% (0.01501) | 80.18th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.53% (0.02534) | 84.06th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.63% (0.03627) | 79.46th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.01% (0.02008) | 82.50th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.18% (0.00182) | 56.77th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.18% (0.00182) | 55.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.18% (0.00182) | 53.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01140) | 59.82th | v2 (v2022.01.01) |
| Sep 18, 2022 | 1.14% (0.01140) | 58.48th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00952) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00952) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.49% (0.03491) | 66.38th | v2 (v2022.01.01) |
| Feb 3, 2022 | 28.63% (0.28632) | 96.49th | v1 |
| Jan 6, 2022 | 28.63% (0.28632) | 96.45th | v1 |
| Sep 1, 2021 | 8.21% (0.08208) | 92.69th | v1 |
| Apr 14, 2021 | 8.21% (0.08208) | 0.00th | v1 |
Weaknesses (0)
No CWE recorded.
References (1)
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1365 x_refsource_MISCPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1365 | x_refsource_MISCPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Oct 10, 2019
Updated Aug 4, 2024
Reserved Nov 26, 2018
Link CVE-2019-1365
CISA Vulnrichment
Updated n/a