CVE-2026-66822

.NET Information Disclosure Vulnerability

Published Oct 13, 2026 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-wxxw-5cvc-53j7 Microsoft Security Advisory CVE-2026-66822 - .NET and Visual Studio Information Disclosure Vulnerability
History
Type Values Removed Values Added
First Time appeared Microsoft microsoft Visual Studio 2022 Version 17.14
Vendors & Products Microsoft microsoft Visual Studio 2022 Version 17.14
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 Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
Title .NET Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft visual Studio 2022
Weaknesses CWE-201
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.10:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft visual Studio 2022
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 8:35 PM
Reserved
Jul 27, 2026, 7:02 PM
Status
Awaiting Analysis
Published
Oct 13, 2026, 7:18 PM
Modified
Oct 22, 2026, 10:18 PM
Severity
Moderate
Public date
Oct 13, 2026, 5:00 PM