CVE-2026-34349

Windows Media Information Disclosure Vulnerability

Published Jul 14, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
Exposure of sensitive information to an unauthorized actor in Windows Media allows an authorized attacker to disclose information locally.

Analysis

AI-generated

Technical impact

The vulnerability allows an attacker who already has legitimate local access to Windows Media to read sensitive data that should remain hidden. This is an Information Exposure flaw (CWE‑200) that exposes confidential information that could be used to compromise user privacy or gain additional footholds within the system. No remote exploitation path is described; the impact is limited to local systems where the attacker is present.

Affected Systems

Affected systems include Microsoft Windows 10 versions 1809, 21H2, and 22H2; Windows 11 versions 24H2, 25H2, and 26H1; and Windows Server 2019, 2022, and 2025 across all supported CPU architectures. The issue applies to both full installations and Server Core installations.

Risk and Exploitability

The CVSS score of 5.5 indicates a moderate severity, and the EPSS score of less than 1% shows a low probability of exploitation. The flaw is not listed in the CISA KEV catalog. The likely attack vector is a local authenticated attacker, who can leverage authorized privileges to trigger the information disclosure as described in the description.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Install the Microsoft security update identified in the Microsoft Security Update Guide for CVE-2026-34349.
  • Restart affected Windows systems to ensure the update is fully applied.
  • Disable or remove third‑party plugins or extensions that interact with Windows Media to prevent residual data leakage if the update cannot be applied immediately.

Generated by OpenCVE AI on July 31, 2026 at 09:49 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Exposure of sensitive information to an unauthorized actor in Windows Media allows an authorized attacker to disclose information locally.
Title Windows Media Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-200
CPEs 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_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_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
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'}