CVE-2021-31914Network attack vector

Unauthenticated server code execution

Published May 11, 2021 · Updated Aug 3, 2024

Remote code execution in JetBrains TeamCity before 2020.2.4 on Windows allows remote attackers to execute arbitrary code on the server. JetBrains and the CVE record do not disclose the affected component or the operation that mishandles attacker-controlled input. Network access is sufficient and requires neither authentication nor user interaction; successful exploitation runs attacker-controlled code on the Windows server.

CVSS severity9.8
Critical
EPSS probability2.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in JetBrains TeamCity before 2020.2.4 on Windows allows remote attackers to execute arbitrary code on the server. JetBrains and the CVE record do not disclose the affected component or the operation that mishandles attacker-controlled input. Network access is sufficient and requires neither authentication nor user interaction; successful exploitation runs attacker-controlled code on the Windows server.

The record

CVE
CVE-2021-31914
Published
May 11, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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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