Description
Use after free in Windows Deployment Services allows an authorized attacker to execute code over a network.
Published: 2026-09-08
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote code execution via Windows Deployment Services
Action: Patch Immediately
AI Analysis

Impact

This vulnerability is a use‑after‑free error in Windows Deployment Services that allows an attacker with authorized access to execute arbitrary code over the network. The flaw can be leveraged to take control of the affected system, compromising confidentiality, integrity, and availability.

Affected Systems

Microsoft Windows 10 versions 1607 and 1809; Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows Server 2016, Microsoft Windows Server 2016 Server Core installation, Microsoft Windows Server 2019, Microsoft Windows Server 2019 Server Core installation, Microsoft Windows Server 2022, Microsoft Windows Server 2025, and Microsoft Windows Server 2025 Server Core installation. These build variants are affected by the use‑after‑free defect outlined in the advisory.

Risk and Exploitability

The CVSS score of 7.5 indicates a high severity vulnerability. The EPSS score of 0.00618 indicates a very low probability of exploitation, though the potential impact remains significant for any organization that runs Windows Deployment Services with network‑available services. The issue is not listed in CISA’s KEV catalog. Attacks would typically require the attacker to be authenticated or have delegated permissions to the Deployment Services service, after which arbitrary code can be executed as the service account.

Generated by OpenCVE AI on September 10, 2026 at 00:40 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Microsoft update for CVE-2026-72943 via the Microsoft Security Response Center update guide.
  • If the Deployment Services are not required, disable or uninstall the feature to eliminate the attack surface.
  • Restrict administrative access to Windows Deployment Services to a minimum set of trusted accounts and enable logging to detect unexpected activity.

Generated by OpenCVE AI on September 10, 2026 at 00:40 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Mon, 21 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

Thu, 10 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows Server 2012 (server Core Installation)
Microsoft windows Server 2012 R2
Microsoft windows Server 2012 R2 (server Core Installation)
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft windows Server 2012 (server Core Installation)
Microsoft windows Server 2012 R2
Microsoft windows Server 2012 R2 (server Core Installation)
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)

Wed, 09 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description Use after free in Windows Deployment Services allows an authorized attacker to execute code over a network.
Title Windows Deployment Services Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-416
CPEs cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Windows 10 1607 Windows 10 1809 Windows Server 2012 Windows Server 2012 (server Core Installation) Windows Server 2012 R2 Windows Server 2012 R2 Windows Server 2012 R2 (server Core Installation) Windows Server 2016 Windows Server 2016 (server Core Installation) Windows Server 2019 Windows Server 2019 (server Core Installation) Windows Server 2022 Windows Server 2025 Windows Server 2025 (server Core Installation)
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-25T21:32:34.517Z

Reserved: 2026-08-10T18:14:23.517Z

Link: CVE-2026-72943

cve-icon Vulnrichment

Updated: 2026-09-09T10:01:53.730Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:20:19.427

Modified: 2026-09-24T23:18:48.587

Link: CVE-2026-72943

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T21:07:30Z

Weaknesses