CVE-2023-21553Network attack vector

Authenticated code execution via undisclosed code injection

Published Feb 14, 2023 · Updated Aug 19, 2026

Code injection in Microsoft Azure DevOps Server 2020.1.2 before 20230131.3 allows remote authenticated users to execute arbitrary code. Microsoft has not published the affected component or how untrusted input reaches code generation. Exploitation requires network access, a low-privileged account, no user interaction, and unspecified high-complexity conditions; success grants code execution on the server.

CVSS severity7.5
High
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Microsoft Azure DevOps Server 2020.1.2 before 20230131.3 allows remote authenticated users to execute arbitrary code. Microsoft has not published the affected component or how untrusted input reaches code generation. Exploitation requires network access, a low-privileged account, no user interaction, and unspecified high-complexity conditions; success grants code execution on the server.

The record

CVE
CVE-2023-21553
Published
Feb 14, 2023
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Azure DevOps Server
Classifications
CWE-94, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record 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=2020.1.0 <20230131.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Azure DevOps Serverversion=2020.1.0 <20230131.3

Published CVSS scores

7.5Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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