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Fencer Vulns
high 7.5

CVE-2022-21911 json

.NET Framework Denial of Service Vulnerability

published 2022-01-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-27067

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

.NET Framework Denial of Service Vulnerability

Patch / fix

  • Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 4.7.3905.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 4.8.4465.0
  • Microsoft Microsoft .NET Framework 4.8 4.8.4465.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 4.7.3905.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 10.0.14393.4886
  • Microsoft Microsoft .NET Framework 2.0 Service Pack 2 2.0.50727.8955
  • Microsoft Microsoft .NET Framework 4.6 4.7.3905.0
  • Microsoft Microsoft .NET Framework 3.5 2.0.50727.8955
  • Microsoft Microsoft .NET Framework 3.5.1 2.0.50727.8955
  • Microsoft Microsoft .NET Framework 4.5.2 4.0.30319.36720

Exploit prediction

3.23% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8
  • Microsoft Microsoft .NET Framework 4.8
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 2.0 Service Pack 2
  • Microsoft Microsoft .NET Framework 4.6
  • Microsoft Microsoft .NET Framework 3.5
  • Microsoft Microsoft .NET Framework 3.5.1
  • Microsoft Microsoft .NET Framework 4.5.2

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.