CVE-2020-0637Network attack vector

Credential disclosure via improper credential handling

Published Jan 14, 2020 · Updated Aug 4, 2024

Information disclosure in Microsoft Windows Server RD Web Access allows remote authenticated users to obtain legitimate user credentials. The role improperly handles credential information, but Microsoft has not disclosed the responsible file, function, or unsafe operation. Windows Server 2008 R2 SP1, 2012, 2012 R2, 2016, and 2019 are affected when the RD Web Access role is present; user interaction is required.

CVSS severity6.5
Medium
EPSS probability5.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Microsoft Windows Server RD Web Access allows remote authenticated users to obtain legitimate user credentials. The role improperly handles credential information, but Microsoft has not disclosed the responsible file, function, or unsafe operation. Windows Server 2008 R2 SP1, 2012, 2012 R2, 2016, and 2019 are affected when the RD Web Access role is present; user interaction is required.

The record

CVE
CVE-2020-0637
Published
Jan 14, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Windows Server
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2008 R2 for x64-based Systems Service Pack 1
  2. Affected versionversion=2008 R2 for x64-based Systems Service Pack 1 (Core installation)
  3. Affected versionversion=2012
  4. Affected versionversion=2012 (Core installation)
  5. Affected versionversion=2012 R2
  6. Affected versionversion=2012 R2 (Core installation)
  7. Affected versionversion=2016
  8. Affected versionversion=2016 (Core installation)
  9. Affected versionversion=2019
  10. Affected versionversion=2019 (Core installation)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Windows Serverversion=2008 R2 for x64-based Systems Service Pack 1; version=2008 R2 for x64-based Systems Service Pack 1 (Core installation); version=2012; version=2012 (Core installation); version=2012 R2; version=2012 R2 (Core installation); version=2016; version=2016 (Core installation); version=2019; version=2019 (Core installation)

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.1MicrosoftCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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