How severe is CVE-2021-41355?

CVE-2021-41355 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-41355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41355?

CVE-2021-41355 primarily affects Microsoft .net. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-41355?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41355 published?

CVE-2021-41355 was published on 2021-10-13 and last updated on 2026-06-17.

CVE-2021-41355

CVE-2021-41355 is a medium-severity vulnerability in Microsoft .net with a CVSS 3.x base score of 5.7. Its EPSS exploit-prediction score of 20% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 3.x base score 5.7)
CVSS v2: 2.9
EPSS exploit prediction: 20% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft .net
Published: 2021-10-13
Last modified: 2026-06-17

Description

.NET Core and Visual Studio Information Disclosure Vulnerability

Frequently asked questions

What is CVE-2021-41355?: .NET Core and Visual Studio Information Disclosure Vulnerability
How severe is CVE-2021-41355?: CVE-2021-41355 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-41355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41355?: CVE-2021-41355 primarily affects Microsoft .net. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-41355?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41355 published?: CVE-2021-41355 was published on 2021-10-13 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:microsoft:.net:5.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*

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