Description
Use after free in Windows Network Connection Broker allows an authorized attacker to disclose information locally.
Published: 2026-09-08
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Apply Patch
AI Analysis

Impact

This vulnerability is a use‑after‑free flaw in the Windows Network Connection Broker that can be exploited by an attacker who already has local authorization. The flaw allows the attacker to read memory that should have been freed, exposing sensitive data that would normally be protected by the operating system. Because the vulnerability is limited to the local context, it results in an information‑disclosure attack rather than remote code execution.

Affected Systems

Affected Microsoft products include Windows 10 build 1607, 1809, 21H2 and 22H2; Windows 11 build 23H2, 24H2, 25H2 and 26H1; and Windows Server 2016, 2019, 2022 and 2025, including their Server Core installations.

Risk and Exploitability

The CVSS base score is 5.5, indicating moderate severity. The EPSS score is not available and the vulnerability is not listed in the CISA KEV catalog, suggesting it has not yet been widely exploited. The likely attack vector is local, requiring that the attacker already possess authorized access to the target machine. If successful, the attacker can read confidential information from the victim’s system, but the impact remains confined to the compromised host and does not provide a remote execution path.

Generated by OpenCVE AI on September 8, 2026 at 21:53 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the Microsoft security update that addresses CVE-2026-68886 as soon as it is released.
  • Apply the principle of least privilege to local user accounts to minimize the risk of an authorized attacker exploiting the flaw.
  • Monitor system logs for unexpected activity from the Network Connection Broker service and investigate any anomalies.

Generated by OpenCVE AI on September 8, 2026 at 21:53 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 17 Sep 2026 12:30:00 +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_10_21h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*

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

Type Values Removed Values Added
First Time appeared Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
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 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)

Tue, 08 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


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

Type Values Removed Values Added
Description Use after free in Windows Network Connection Broker allows an authorized attacker to disclose information locally.
Title Windows Network Connection Broker Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-209
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_10_21H2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*: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 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Windows 10 1607 Windows 10 1809 Windows 10 21h2 Windows 10 21h2 Windows 10 22h2 Windows 10 22h2 Windows 11 23h2 Windows 11 23h2 Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 Windows 11 25h2 Windows 11 26h1 Windows 11 26h1 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: 2026-09-25T21:34:39.608Z

Reserved: 2026-07-31T20:06:14.674Z

Link: CVE-2026-68886

cve-icon Vulnrichment

Updated: 2026-09-08T20:15:34.587Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:18:35.960

Modified: 2026-09-17T12:16:05.337

Link: CVE-2026-68886

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T21:03:38Z

Weaknesses
  • CWE-209

    Generation of Error Message Containing Sensitive Information

  • CWE-416

    Use After Free