CVE-2026-83948Network attack vector

Code execution via unquoted VM tag values

Published Sep 8, 2026 · Updated Sep 10, 2026

Command injection in Microsoft Azure CLI's vm-repair extension before 2.2.1 allows remote authenticated users to execute code on Windows. The extension interpolates copied source-VM tag values into a nested az command without neutralizing shell metacharacters, which cmd.exe interprets as commands. Exploitation requires permission to set a source VM tag and an operator to invoke a repair command with tag copying enabled.

CVSS severity8.0
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Microsoft Azure CLI's vm-repair extension before 2.2.1 allows remote authenticated users to execute code on Windows. The extension interpolates copied source-VM tag values into a nested az command without neutralizing shell metacharacters, which cmd.exe interprets as commands. Exploitation requires permission to set a source VM tag and an operator to invoke a repair command with tag copying enabled.

The record

CVE
CVE-2026-83948
Published
Sep 8, 2026
Updated
Sep 10, 2026
Vendor
Microsoft
Product
Microsoft Azure CLI
Classifications
CWE-77, T1059.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=1.0.0 <2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft Azure CLIversion=1.0.0 <2.2.1

Published CVSS scores

8.0MicrosoftCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/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-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.003Command and Scripting Interpreter: Windows Command Shell

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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