Microsoft Windows
CVE-2019-0838 — Windows Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability. The security update addresses the vulnerability by changing how Task Scheduler handles credentials.
Overview
7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
Low
AVAILABILITY
Low
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.9
EPSS Score
0.02058
probability of exploitation in the next 30 days
0.7932 percentile - updated 2026-07-25
View on FIRST.org
Affected Products
26 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 4493475 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 for x64-based Systems | 4493475 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 4493470 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1607 for x64-based Systems | 4493470 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1703 for 32-bit Systems | 4493474 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1703 for x64-based Systems | 4493474 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1709 for 32-bit Systems | 4493441 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1709 for ARM64-based Systems | 4493441 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1709 for x64-based Systems | 4493441 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for 32-bit Systems | 4493464 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for ARM64-based Systems | 4493464 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for x64-based Systems | 4493464 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 4493509 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 4493509 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4493509 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for 32-bit Systems | 4530684 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for ARM64-based Systems | 4530684 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for x64-based Systems | 4530684 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 4493472 (Monthly Rollup) 4493448 (Security Only) Important Information Disclosure 4489878 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 7 for x64-based Systems Service Pack 1 4493472 (Monthly Rollup) 4493448 (Security Only) Important Information Disclosure 4489878 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 8.1 for 32-bit systems 4493446 (Monthly Rollup) 4493467 (Security Only) Important Information Disclosure 4489881 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4493446 (Monthly Rollup) 4493467 (Security Only) Important Information Disclosure 4489881 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows RT 8.1 | 4493446 (Monthly Rollup) |
Important | Information Disclosure | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 4493471 (Monthly Rollup) 4493458 (Security Only) Important Information Disclosure 4489880 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4493471 (Monthly Rollup) 4493458 (Security Only) Important Information Disclosure 4489880 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 for Itanium-Based Systems Service Pack 2 4493471 (Monthly Rollup) 4493458 (Security Only) Important Information Disclosure 4489880 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 4493471 (Monthly Rollup) 4493458 (Security Only) Important Information Disclosure 4489880 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4493471 (Monthly Rollup) 4493458 (Security Only) Important Information Disclosure 4489880 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4493472 (Monthly Rollup) 4493448 (Security Only) Important Information Disclosure 4489878 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4493472 (Monthly Rollup) 4493448 (Security Only) Important Information Disclosure 4489878 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4493472 (Monthly Rollup) 4493448 (Security Only) Important Information Disclosure 4489878 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2012 4493451 (Monthly Rollup) 4493450 (Security Only) Important Information Disclosure 4489891 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4493451 (Monthly Rollup) 4493450 (Security Only) Important Information Disclosure 4489891 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4493446 (Monthly Rollup) 4493467 (Security Only) Important Information Disclosure 4489881 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4493446 (Monthly Rollup) 4493467 (Security Only) Important Information Disclosure 4489881 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:P/RL:O/RC:C Yes None Windows Server 2016 | 4493470 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2016 (Server Core installation) | 4493470 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 | 4493509 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 (Server Core installation) | 4493509 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1709 (Server Core Installation) | 4493441 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4493464 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1903 (Server Core installation) | 4530684 (Security Update) |
Important | Information Disclosure | Yes |
Patches
8 patches
| Article | Type | Restart |
|---|---|---|
4493475 |
Security Update | Yes |
4493470 |
Security Update | Yes |
4493474 |
Security Update | Yes |
4493441 |
Security Update | Yes |
4493464 |
Security Update | Yes |
4493509 |
Security Update | Yes |
4530684 |
Security Update | Yes |
4493446 |
Monthly Rollup | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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