CVE-2026-108398
.NET Framework Security Feature Bypass Vulnerability
At a glance
- Severity
- HIGH 8.8
- EPSS
- EPSS 0.78 % · percentile 56 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Awaiting Analysis
Description
Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2026-99069
- GCVE · GCVE-0-2026-108398
CERT-FR advisories
- CERTFR-2026-AVI-1313 — Multiples vulnérabilités dans Microsoft .Net · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 | affected 3.0.0.0 < 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 |
| Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 | affected 4.7.0 < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 |
| Microsoft · Microsoft .NET Framework 3.5 AND 4.8 | affected 4.8.0 < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 |
| Microsoft · Microsoft .NET Framework 3.5 AND 4.8.1 | affected 4.8.1 < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 |
| Microsoft · Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | affected 4.7.0 < 4.7.4150.0 |
| Microsoft · Microsoft .NET Framework 4.8 | affected 4.8.0 < 4.8.4811.0 |
| Microsoft · Microsoft .NET Framework 4.8.1 | affected 4.8.0.0 < 4.8.9363.0 |
References
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 |