VulnerabilityAnalyzed
CVE-2026-47304
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
CRITICAL 9.8EPSS 0.22%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.22% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-345, CWE-347
- Affected
- microsoft/.net framework · microsoft/.net · microsoft/visual studio 2017 · microsoft/visual studio 2019 · microsoft/visual studio 2022 · microsoft/visual studio 2026
- Source
- secure@microsoft.com
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.