CVE-2026-47304
criticalImproper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
Vendor / product: Microsoft — .net framework
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-07-14 19:17
Modified: 2026-10-28 20:17
NVD status: Analyzed
Last synced 11 hours ago
Verified against the source API 2026-10-28 20:34 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / .net_framework 4.8.1, 4.8, 4.6.2, 4.7, 4.7.1, 4.7.2
microsoft / .net ≥8.0.0 <8.0.29, ≥9.0.0 <9.0.18, ≥10.0.0 <10.0.6
microsoft / visual_studio_2017 ≥15.0 ≤15.9
microsoft / visual_studio_2019 ≥16.0 ≤16.11
microsoft / visual_studio_2022 ≥17.12.0 <17.12.22, ≥17.14.0 <17.14.36
microsoft / visual_studio_2026 ≥18.7.0 <18.7.4, 18.5.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 20:34 UTC · record ↗