CVE-2026-66822
.NET Information Disclosure Vulnerability
MEDIUM 5.9
At a glance
- Source
- NVD
- EPSS
- EPSS 0.78 % · percentile 56 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Awaiting Analysis
Description
Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
Weaknesses (CWE)
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.9 | 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 | microsoft |
| CVSS 3.1 | MEDIUM 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · secure@microsoft.com (Secondary) |
Advisories
- GHSA-wxxw-5cvc-53j7 — Microsoft Security Advisory CVE-2026-66822 - .NET and Visual Studio Information Disclosure Vulnerability
European references
- ENISA EUVD · EUVD-2026-99277
- GCVE · GCVE-0-2026-66822
CERT-FR advisories
- CERTFR-2026-AVI-1316 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1313 — Multiples vulnérabilités dans Microsoft .Net · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Microsoft · .NET 10.0 runtime | affected 10.0.0 < 10.0.13 |
| Microsoft · .NET 11.0 runtime | affected 11.0.0 < 11.0.0-rc.2 |
| Microsoft · .NET 8.0 runtime | affected 8.0.0 < 8.0.32 |
| Microsoft · .NET 9.0 runtime | affected 9.0.0 < 9.0.21 |
| Microsoft · Microsoft Visual Studio 2022 version 17.14 | affected 17.14.0 < 17.14.42 |
| Microsoft · Microsoft Visual Studio 2026 version 18.10 | affected 18.10.0 < 18.10.4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |