Deserialization in Microsoft .Net Framework 3.5

CVE-2026-50646

Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code locally.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-50646?
CVE-2026-50646 is a high-severity vulnerability in Microsoft .Net Framework 3.5, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2026-07-14.
How severe is CVE-2026-50646?
High severity. CVSS v3 base score is 7.8 out of 10.