Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | CNA (microsoft) |
- CISA KEV Not listed.
- EPSS 0.011, the 65th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:21 UTC First seen by agentprime
- 31 Oct 2026, 15:21 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-266m-wp2v-x7mq
- OSV: GHSA-266m-wp2v-x7mq
- github.com/dotnet/runtime/security/advisories/GHSA-266m-wp2v-x7mq
- nvd.nist.gov/vuln/detail/CVE-2025-30399
- github.com/dotnet/runtime/issues/116495
- github.com/dotnet/runtime
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30399
- www.cve.org/CVERecord?id=CVE-2025-30399