How severe is CVE-2024-21312?

CVE-2024-21312 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-21312 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21312?

CVE-2024-21312 primarily affects Microsoft .net Framework. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-21312?

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-2024-21312 have an EU (EUVD) identifier?

Yes. CVE-2024-21312 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19025.

When was CVE-2024-21312 published?

CVE-2024-21312 was published on 2024-01-09 and last updated on 2026-06-17.

CVE-2024-21312

CVE-2024-21312 is a high-severity vulnerability in Microsoft .net Framework with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19025
Weakness: CWE-20
Affected product: Microsoft .net Framework
Published: 2024-01-09
Last modified: 2026-06-17

Description

.NET Framework Denial of Service Vulnerability

Frequently asked questions

What is CVE-2024-21312?: .NET Framework Denial of Service Vulnerability
How severe is CVE-2024-21312?: CVE-2024-21312 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-21312 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21312?: CVE-2024-21312 primarily affects Microsoft .net Framework. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-21312?: 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-2024-21312 have an EU (EUVD) identifier?: Yes. CVE-2024-21312 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19025.
When was CVE-2024-21312 published?: CVE-2024-21312 was published on 2024-01-09 and last updated on 2026-06-17.

References

Affected products (7)

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_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:4.7.2:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*

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