CVE-2026-21515Network attack vector

Authenticated privilege escalation via sensitive information exposure

Published Apr 24, 2026 · Updated Apr 24, 2026

Information exposure in Microsoft Azure IoT Central allows remote authenticated users to elevate privileges through its network service. Microsoft has not disclosed the sensitive information exposed, the affected request or API, or how the data enables privilege escalation. A low-privileged account is required; the resulting privilege gain can grant control over protected resources beyond the account's original authorization.

CVSS severity9.9
Critical
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information exposure in Microsoft Azure IoT Central allows remote authenticated users to elevate privileges through its network service. Microsoft has not disclosed the sensitive information exposed, the affected request or API, or how the data enables privilege escalation. A low-privileged account is required; the resulting privilege gain can grant control over protected resources beyond the account's original authorization.

The record

CVE
CVE-2026-21515
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
Microsoft
Product
Azure IoT Central
Classifications
CWE-200, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Azure IoT Centralversion=-

Published CVSS scores

8.6Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
9.9Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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-200Exposure of Sensitive Information to an Unauthorized Actor
T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo