CVE-2021-31957

CVE-2021-31957 is a medium-severity vulnerability in Microsoft .net with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

ASP.NET Core Denial of Service Vulnerability

Frequently asked questions

What is CVE-2021-31957?
ASP.NET Core Denial of Service Vulnerability
How severe is CVE-2021-31957?
CVE-2021-31957 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-31957 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31957?
CVE-2021-31957 primarily affects Microsoft .net. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31957?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31957 published?
CVE-2021-31957 was published on 2021-06-08 and last updated on 2026-06-17.

References

Affected products (6)

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