CVE-2026-24302Network attack vector

Unauthenticated cross-boundary privilege escalation

Published Feb 5, 2026 · Updated Feb 5, 2026

Improper access control in Microsoft Azure Arc allows remote attackers to elevate privileges over a network without authentication. Microsoft has not published the affected Arc component, protected resource, or access-control operation that fails on an unauthorized request. The flaw is confined to Microsoft's exclusively hosted service and exposes sensitive information across a security boundary, with no reported integrity or availability impact.

CVSS severity8.6
High
EPSS probability1.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Microsoft Azure Arc allows remote attackers to elevate privileges over a network without authentication. Microsoft has not published the affected Arc component, protected resource, or access-control operation that fails on an unauthorized request. The flaw is confined to Microsoft's exclusively hosted service and exposes sensitive information across a security boundary, with no reported integrity or availability impact.

The record

CVE
CVE-2026-24302
Published
Feb 5, 2026
Updated
Feb 5, 2026
Vendor
Microsoft
Product
Azure Arc
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 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?

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  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Azure Arcversion=-

Published CVSS scores

8.6Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
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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