VDB
msrc_CVE-2026-42899
msrc_CVE-2026-42899
PUBLISHED
CVSS 7.5 HIGH
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| .NET 8.0 installed on Windows <8.0.27 | ||
| .NET 9.0 installed on Linux <9.0.16 | ||
| .NET 9.0 installed on Mac OS <9.0.16 | ||
| .NET 10.0 installed on Mac OS 10.0.8 | ||
| .NET 8.0 installed on Linux <8.0.27 | ||
| .NET 10.0 installed on Windows <10.0.8 | ||
| .NET 8.0 installed on Linux 8.0.27 | ||
| .NET 10.0 installed on Mac OS <10.0.8 | ||
| .NET 8.0 installed on Mac OS <8.0.27 | ||
| .NET 8.0 installed on Mac OS 8.0.27 | ||
| .NET 10.0 installed on Linux 10.0.8 | ||
| .NET 9.0 installed on Windows 9.0.16 | ||
| .NET 9.0 installed on Linux 9.0.16 | ||
| .NET 8.0 installed on Windows 8.0.27 | ||
| .NET 10.0 installed on Windows 10.0.8 | ||
| .NET 9.0 installed on Mac OS 9.0.16 | ||
| .NET 9.0 installed on Windows <9.0.16 | ||
| .NET 10.0 installed on Linux <10.0.8 |
Exploit Intelligence
- https://www.first.org/cvss (circl)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899 (circl)
- https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42899.json (circl)
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 (circl)
- https://support.microsoft.com/lifecycle (circl)
- https://support.microsoft.com/help/5093447 (circl)
- https://support.microsoft.com/help/5093448 (circl)
- https://support.microsoft.com/help/5093446 (circl)
Timeline
- May 12, 2026 CVE Published
- May 13, 2026 Security Advisory
- May 13, 2026 Security Advisory
References
- https://www.first.org/cvss url
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899 advisory
- https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42899.json advisory
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 url
- https://support.microsoft.com/lifecycle url
- https://support.microsoft.com/help/5093447 fix
- https://support.microsoft.com/help/5093448 fix
- https://support.microsoft.com/help/5093446 fix