CVE-2019-0603 — Windows Deployment Services TFTP Server Remote Code Execution Vulnerability

Executive Summary

A remote code execution vulnerability exists in the way that Windows Deployment Services TFTP Server handles objects in memory. An attacker who successfully exploited the vulnerability could execute arbitrary code with elevated permissions on a target system. To exploit the vulnerability, an attacker could create a specially crafted request, causing Windows to execute arbitrary code with elevated permissions. The security update addresses the vulnerability by correcting how Windows Deployment Services TFTP Server handles objects in memory.

Overview

7.5

CVSS HIGH

Critical

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Mar 12 2019

Last Updated Mar 12 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.34209 — 0.98238 percentile

NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/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

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.7

EPSS Score

0.34209

probability of exploitation in the next 30 days

0.98238 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

14 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1607 for 32-bit Systems	`4489882 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1607 for x64-based Systems	`4489882 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1803 for 32-bit Systems	`4489868 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1803 for ARM64-based Systems	`4489868 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1803 for x64-based Systems	`4489868 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1809 for 32-bit Systems	`4489899 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1809 for ARM64-based Systems	`4489899 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1809 for x64-based Systems	`4489899 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 7 for 32-bit Systems Service Pack 1 4489878 (Monthly Rollup) 4489885 (Security Only) Critical Remote Code Execution 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 7 for x64-based Systems Service Pack 1 4489878 (Monthly Rollup) 4489885 (Security Only) Critical Remote Code Execution 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 8.1 for 32-bit systems 4489881 (Monthly Rollup) 4489883 (Security Only) Critical Remote Code Execution 4487000 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4489881 (Monthly Rollup) 4489883 (Security Only) Critical Remote Code Execution 4487000 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows RT 8.1	`4489881 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 4489880 (Monthly Rollup) 4489876 (Security Only) Critical Remote Code Execution 4487023 4487019 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4489880 (Monthly Rollup) 4489876 (Security Only) Critical Remote Code Execution 4487023 4487019 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 for Itanium-Based Systems Service Pack 2 4489880 (Monthly Rollup) 4489876 (Security Only) Critical Remote Code Execution 4487023 4487019 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 4489880 (Monthly Rollup) 4489876 (Security Only) Critical Remote Code Execution 4487023 4487019 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4489880 (Monthly Rollup) 4489876 (Security Only) Critical Remote Code Execution 4487023 4487019 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4489878 (Monthly Rollup) 4489885 (Security Only) Critical Remote Code Execution 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4489878 (Monthly Rollup) 4489885 (Security Only) Critical Remote Code Execution 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4489878 (Monthly Rollup) 4489885 (Security Only) Critical Remote Code Execution 4486563 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 4489891 (Monthly Rollup) 4489884 (Security Only) Critical Remote Code Execution 4487025 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4489891 (Monthly Rollup) 4489884 (Security Only) Critical Remote Code Execution 4487025 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4489881 (Monthly Rollup) 4489883 (Security Only) Critical Remote Code Execution 4487000 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4489881 (Monthly Rollup) 4489883 (Security Only) Critical Remote Code Execution 4487000 Base: 7.5 Temporal: 6.7 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2016	`4489882 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`4489882 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019	`4489899 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019 (Server Core installation)	`4489899 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server, version 1803 (Server Core Installation)	`4489868 (Security Update)`	Critical	Remote Code Execution	Yes

Patches

4 patches

Article	Type	Restart
`4489882`	Security Update	Yes
`4489868`	Security Update	Yes
`4489899`	Security Update	Yes
`4489881`	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

John Simpson working with Trend Micro's Zero Day Initiative

References

MSRC Advisory MITRE NVD