How severe is CVE-2025-21172?

CVE-2025-21172 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21172 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21172?

CVE-2025-21172 primarily affects Microsoft .net. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21172?

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-2025-21172 have an EU (EUVD) identifier?

Yes. CVE-2025-21172 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-0074.

When was CVE-2025-21172 published?

CVE-2025-21172 was published on 2025-01-14 and last updated on 2026-06-17.

CVE-2025-21172

CVE-2025-21172 is a high-severity vulnerability in Microsoft .net 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-0074
Weakness: CWE-122
Affected product: Microsoft .net
Published: 2025-01-14
Last modified: 2026-06-17

Description

.NET and Visual Studio Remote Code Execution Vulnerability

Frequently asked questions

What is CVE-2025-21172?: .NET and Visual Studio Remote Code Execution Vulnerability
How severe is CVE-2025-21172?: CVE-2025-21172 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-21172 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21172?: CVE-2025-21172 primarily affects Microsoft .net. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-21172?: 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-2025-21172 have an EU (EUVD) identifier?: Yes. CVE-2025-21172 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-0074.
When was CVE-2025-21172 published?: CVE-2025-21172 was published on 2025-01-14 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:microsoft:.net:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:9.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*

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