Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-50646: .NET Framework Remote Code Execution Vulnerability

Not in the CISA KEV catalog. High advisory severity (CVSS 7.8, MS Server).

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

CVE-2026-50646 key facts

CISA KEV: Not listed (catalog checked Nov 6, 2026)
Highest advisory severity: High
CVSS base score: 7.8 (MS Server), 7.8 (Red Hat)
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (Red Hat)
Weakness: CWE-807
Fixed releases: MS Server: KB5101009 (build 4.8.4803.0), KB5101007 (build 4.8.4803.0), KB5101008 (build 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0), KB5101006 (build 2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0), KB5099535 (build 2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0), KB5100991 (build 4.7.4143.0) and 2 more in the advisory
Red Hat: dotnet8.0-0:8.0.129-1.el10_2, dotnet9.0-0:9.0.119-1.el10_2, dotnet10.0-0:10.0.110-1.el10_2, dotnet8.0-0:8.0.130-1.el10_0, dotnet9.0-0:9.0.120-1.el10_0, dotnet9.0-0:9.0.119-1.el8_10 and 27 more in the advisory
Vendor advisories: 2 from MS Server, Red Hat
VulniPulse record: Published Jul 14, 2026 · Updated Jul 31, 2026

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-50646; bulletin-wide values are not repeated here.

Is CVE-2026-50646 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-50646 is not in the CISA KEV catalog (checked Nov 6, 2026) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-50646?

Upgrade to a fixed release named by the vendor:

MS Server: KB5101009 (build 4.8.4803.0), KB5101007 (build 4.8.4803.0), KB5101008 (build 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0), KB5101006 (build 2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0), KB5099535 (build 2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0), KB5100991 (build 4.7.4143.0)
Red Hat: dotnet8.0-0:8.0.129-1.el10_2, dotnet9.0-0:9.0.119-1.el10_2, dotnet10.0-0:10.0.110-1.el10_2, dotnet8.0-0:8.0.130-1.el10_0, dotnet9.0-0:9.0.120-1.el10_0, dotnet9.0-0:9.0.119-1.el8_10

Install the applicable security update for your platform: KB5101009, KB5101007, KB5101008, KB5101006, KB5099535, KB5100991 (see the Microsoft Update Catalog). (MS Server)

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Vendor advisory comparison

MS Server

1 advisory

Advisory severityHigh7.8
High [CVE-2026-50646] .NET Framework Remote Code Execution Vulnerability
CVE-2026-50646Source published Jul 14, 2026
.NET Framework Remote Code Execution Vulnerability Affected products named by the advisory: Microsoft.NET Framework 4.8 on Windows Server 2012; Microsoft.NET Framework 4.8 on Windows Server 2016; Microsoft.NET Framework 3.5 AND 4.7.2 on Windows Server 2016; Microsoft.NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2; and 4 more. Affected products named by the advisory: Microsoft .NET Framework 4.8 on Windows Server 2012 R2; Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019; Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022.
Affected products in this advisory
Microsoft .NET Framework 4.8 on Windows Server 2016
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2
Microsoft .NET Framework 4.8 on Windows Server 2012 R2
2 more entries in the full advisory.
Source-reported affected versions
Affected-version details not available in this record.
Source-reported fixed versions
KB5101009 (build 4.8.4803.0)
KB5101007 (build 4.8.4803.0)
KB5101008 (build 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0)
KB5101006 (build 2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0)
4 more entries in the full advisory.
Mitigation guidance
Install the applicable security update for your platform: KB5101009, KB5101007, KB5101008, KB5101006, KB5099535, KB5100991 (see the Microsoft Update Catalog).
Full advisory and evidence Open source bulletin

Red Hat

1 advisory

Advisory severityHigh7.8
High [CVE-2026-50646] .NET Framework: Local Code Execution via Protection Mechanism Failure
CVE-2026-50646Source published Jul 14, 2026Source updated Jul 14, 2026
Protection mechanism failure in.NET Framework allows an unauthorized attacker to execute code locally. Successful exploitation of this vulnerability can lead to a complete compromise of the affected system. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-807. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Hardened Images. Red Hat lists Red Hat Hardened Images; Red Hat OpenShift Dev Spaces as not affected. Red Hat fixing advisory: RHSA-2026:41893, RHSA-2026:41895, RHSA-2026:41897…
Affected products in this advisory
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
Red Hat Enterprise Linux 9.6 Extended Update Support
4 more entries in the full advisory.
Source-reported affected versions
Affected-version details not available in this record.
Source-reported fixed versions
dotnet8.0-0:8.0.129-1.el10_2
dotnet9.0-0:9.0.119-1.el10_2
dotnet10.0-0:10.0.110-1.el10_2
dotnet8.0-0:8.0.130-1.el10_0
29 more entries in the full advisory.
Mitigation guidance
No mitigation guidance extracted; consult the source.
Full advisory and evidence Open source bulletin

All MS Server advisories

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