CVE-2025-47989Public exploitHinoki check available

SYSTEM code execution via ExtensionService hijacking

Published Oct 14, 2025 · Updated Oct 14, 2025

Improper access control in Azure Connected Machine agent before 1.57 allows local users to execute code as SYSTEM on Windows. The ExtensionService accepts unverified metadata and access tokens from the local HIMDS HTTP endpoint, allowing a port-squatting listener to redirect it to an attacker-controlled tenant and deploy a malicious extension. Exploitation requires a low-privileged local user to trigger MSI repair, win the listener race, and control an Azure tenant.

CVSS severity7.0
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper access control in Azure Connected Machine agent before 1.57 allows local users to execute code as SYSTEM on Windows. The ExtensionService accepts unverified metadata and access tokens from the local HIMDS HTTP endpoint, allowing a port-squatting listener to redirect it to an attacker-controlled tenant and deploy a malicious extension. Exploitation requires a low-privileged local user to trigger MSI repair, win the listener race, and control an Azure tenant.

The record

CVE
CVE-2025-47989
Published
Oct 14, 2025
Updated
Oct 14, 2025
Vendor
Microsoft
Product
Azure Connected Machine agent
Classifications
CWE-284, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2025Record 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 <xxxxx

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Azure Connected Machine agentversion=1.0.0 <xxxxx

Published CVSS scores

7.0MicrosoftCVSS:3.1/AV:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

Public exploit references

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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