CVE-2026-23661Network attack vector

Information disclosure via unencrypted HTTP listener

Published Mar 10, 2026 · Updated Mar 10, 2026

Cleartext transmission in Microsoft Azure IoT Explorer before 0.15.13 allows remote attackers to read sensitive data over a network. The ServerBase component creates its application listener with Node.js http.createServer, so requests and responses carrying IoT Hub information lack transport encryption. Exploitation requires network reachability to the running listener; the published impact is disclosure only, with no integrity or availability loss.

CVSS severity7.5
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Microsoft Azure IoT Explorer before 0.15.13 allows remote attackers to read sensitive data over a network. The ServerBase component creates its application listener with Node.js http.createServer, so requests and responses carrying IoT Hub information lack transport encryption. Exploitation requires network reachability to the running listener; the published impact is disclosure only, with no integrity or availability loss.

The record

CVE
CVE-2026-23661
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Microsoft
Product
Azure IoT Explorer
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 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 <0.15.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Azure IoT Explorerversion=1.0.0 <0.15.13

Published CVSS scores

7.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

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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