VDB
MSRC_CVE-2026-23666
MSRC_CVE-2026-23666
PUBLISHED
CVSS 7.5 HIGH
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 | ||
| Microsoft .NET Framework 4.8 4.8.4801.0 | ||
| Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 | ||
| Microsoft .NET Framework 4.8 <4.8.4801.0 |
Timeline
- Apr 14, 2026 CVE Published
- Apr 15, 2026 Security Advisory
- Apr 15, 2026 Security Advisory
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666 advisory
- https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-23666.json advisory
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 url
- https://support.microsoft.com/lifecycle url
- https://www.first.org/cvss url
- https://support.microsoft.com/help/5082411 fix
- https://support.microsoft.com/help/5082403 fix
- https://support.microsoft.com/help/5082404 fix
- https://support.microsoft.com/help/5082414 fix
- https://support.microsoft.com/help/5082427 fix
- https://support.microsoft.com/help/5082426 fix
- https://support.microsoft.com/help/5082413 fix
- https://support.microsoft.com/help/5082400 fix
- https://support.microsoft.com/help/5082402 fix
- https://support.microsoft.com/help/5082425 fix
- https://support.microsoft.com/help/5082419 fix
- https://support.microsoft.com/help/5082424 fix
- https://support.microsoft.com/help/5082417 fix
- https://support.microsoft.com/help/5082418 fix
- https://support.microsoft.com/help/5082420 fix
…and 3 more