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Description

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

PUBLISHED Reserved 2026-06-05 | Published 2026-07-14 | Updated 2026-07-14 | Assigner microsoft




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-693: Protection Mechanism Failure

CWE-502: Deserialization of Untrusted Data

Product status

8.0.0 (custom) before 8.0.29
affected

9.0.0 (custom) before 9.0.18
affected

3.5.0 (custom) before 2.0.50727.8983 & 3.0.30729.8978
affected

4.7.0 (custom) before 2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0
affected

4.8.0 (custom) before 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0
affected

4.8.1 (custom) before 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
affected

4.7.0 (custom) before 4.7.4143.0
affected

4.8.0 (custom) before 4.8.4803.0
affected

17.12.0 (custom) before 17.12.22
affected

17.14.0 (custom) before 17.14.36
affected

18.0 (custom) before 18.7.4
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50646 (.NET Framework Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2026-50646)

nvd.nist.gov (CVE-2026-50646)

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