Windows Update Stack
CVE-2019-1337 — Windows Update Client Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when Windows Update Client fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could potentially disclose memory contents of an elevated process. To exploit this vulnerability, an authenticated attacker could run a specially crafted application in user mode. The update addresses the vulnerability by correcting how the Windows Update Client handles objects in memory.
Overview
5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 5.0
EPSS Score
0.02052
probability of exploitation in the next 30 days
0.78766 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
9 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1809 for 32-bit Systems | 4519338 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 4519338 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4519338 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for 32-bit Systems | 4517389 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for ARM64-based Systems | 4517389 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for x64-based Systems | 4517389 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 | 4519338 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 (Server Core installation) | 4519338 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1903 (Server Core installation) | 4517389 (Security Update) |
Important | Information Disclosure | Yes |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
4519338 |
Security Update | Yes |
4517389 |
Security Update | 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
pgboy of Qihoo 360 Vulcan Team
References
On This Page