CVE-2026-108398
.NET Framework Security Feature Bypass Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.
Timeline
ID reserved
By microsoft
- 4 days later
· 4 days later
Published
- 18 days later
· 18 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High8.8 | 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 |
| NVDNVD · Awaiting Analysis | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.78% · top 44% of all CVEs (8 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
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 (1)
- .NET Framework Security Feature Bypass Vulnerability (opens in a new tab)vendor-advisorypatch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-108398)Record last updated .