CVE-2021-27067Network attack vector

Authenticated disclosure of unspecified server information

Published Apr 13, 2021 · Updated Aug 3, 2024

Information disclosure in Microsoft Azure DevOps Server and Team Foundation Server allows remote authenticated users to read sensitive data. Microsoft has not published the affected component, crafted-message format, erroneous operation, or specific information exposed. A low-privileged account can reach the flaw over the network without user interaction, but the disclosed information remains unspecified.

CVSS severity6.5
Medium
EPSS probability2.65%
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 Azure DevOps Server and Team Foundation Server allows remote authenticated users to read sensitive data. Microsoft has not published the affected component, crafted-message format, erroneous operation, or specific information exposed. A low-privileged account can reach the flaw over the network without user interaction, but the disclosed information remains unspecified.

The record

CVE
CVE-2021-27067
Published
Apr 13, 2021
Updated
Aug 3, 2024
Vendor
Microsoft
Product
Team Foundation Server
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=1.0 <publication
  2. Affected versionversion=3.0 <publication
  3. Affected versionversion=4.0 <publication

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Team Foundation Serverversion=1.0 <publication; version=3.0 <publication; version=4.0 <publication
Microsoft · Azure DevOps Serverversion=0 <publication; version=1.0 <publication; version=2019.0.0 <publication; version=2020 <publication

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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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