How severe is CVE-2024-21409?

CVE-2024-21409 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-21409 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21409?

CVE-2024-21409 primarily affects Microsoft .net Framework. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-21409?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-21409 have an EU (EUVD) identifier?

Yes. CVE-2024-21409 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1130.

When was CVE-2024-21409 published?

CVE-2024-21409 was published on 2024-04-09 and last updated on 2026-06-17.

CVE-2024-21409

CVE-2024-21409 is a high-severity vulnerability in Microsoft .net Framework with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1130
Weakness: CWE-416
Affected product: Microsoft .net Framework
Published: 2024-04-09
Last modified: 2026-06-17

Description

.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability

Frequently asked questions

What is CVE-2024-21409?: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
How severe is CVE-2024-21409?: CVE-2024-21409 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-21409 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21409?: CVE-2024-21409 primarily affects Microsoft .net Framework. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-21409?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-21409 have an EU (EUVD) identifier?: Yes. CVE-2024-21409 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1130.
When was CVE-2024-21409 published?: CVE-2024-21409 was published on 2024-04-09 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:a:microsoft:.net_framework:3.5:-:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*

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