How severe is CVE-2025-21173?

CVE-2025-21173 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-2025-21173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21173?

CVE-2025-21173 primarily affects Microsoft Visual Studio 2022. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21173?

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-2025-21173 have an EU (EUVD) identifier?

Yes. CVE-2025-21173 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2256.

When was CVE-2025-21173 published?

CVE-2025-21173 was published on 2025-01-14 and last updated on 2026-06-17.

CVE-2025-21173

CVE-2025-21173 is a high-severity vulnerability in Microsoft Visual Studio 2022 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-379.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2256
Weakness: CWE-379
Affected product: Microsoft Visual Studio 2022
Published: 2025-01-14
Last modified: 2026-06-17

Description

.NET Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2025-21173?: .NET Elevation of Privilege Vulnerability
How severe is CVE-2025-21173?: CVE-2025-21173 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-2025-21173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21173?: CVE-2025-21173 primarily affects Microsoft Visual Studio 2022. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-21173?: 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-2025-21173 have an EU (EUVD) identifier?: Yes. CVE-2025-21173 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2256.
When was CVE-2025-21173 published?: CVE-2025-21173 was published on 2025-01-14 and last updated on 2026-06-17.

References

Affected products (3)

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

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