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Fencer Intel
medium 5.5

CVE-2020-16937 json

.NET Framework Information Disclosure Vulnerability

published 6y ago modified 4mo ago also EUVD-2020-8895

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

<p>An information disclosure vulnerability exists when the .NET Framework improperly handles objects in memory. An attacker who successfully exploited the vulnerability could disclose contents of an affected system's memory.</p> <p>To exploit the vulnerability, an authenticated attacker would need to run a specially crafted application.</p> <p>The update addresses the vulnerability by correcting how the .NET Framework handles objects in memory.</p>

Patch / fix

Is CVE-2020-16937 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-16937 updated cvss 5.5

dotnet: .NET Framework improperly handles objects in memory which could result in Information Disclosure

  • Red Hat .NET Core 2.1 on Red Hat Enterprise Linux rh-dotnet21, rh-dotnet21-runtime Red Hat .NET Core 3.1 on Red Hat Enterprise Linux rh-dotnet31, rh-dotnet31-runtime Red Hat Enterprise Linux 8 dotnet, dotnet3.1, dotnet-host, dotnet-sdk-2.1, dotnet-sdk-3.1, dotnet-hostfxr-3.1, +11 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.29% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

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

References

Sources

Fencer Intel 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.