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CVE-2026-23662 is a high-severity vulnerability in Microsoft Azure IoT Explorer, a tool used to inspect and interact with IoT devices . The issue stems from a missing authentication check for a critical function within the application, specifically involving the transmission of sensitive information over a network . This allows an unauthorized remote attacker to disclose information without any privileges or user interaction . The root cause is mapped to CWE-306 (Missing Authentication for Critical Function) and CWE-319 (Cleartext Transmission of Sensitive Information) . This means a service or API endpoint in the client is bound to the network and does not require credentials, potentially exposing connection strings, device keys, and telemetry data to anyone on the same network . The vulnerability affects all versions from 1.0.0 up to, but not including, 0.15.13 . The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) highlights that the attack is network-based, low in complexity, and has a high impact on confidentiality .
dailycve form:
Platform: Azure IoT Explorer
Version: 1.0.0 to <0.15.13
Vulnerability : Missing Authentication
Severity: HIGH
date: 2026-03-10
Prediction: include expected Patch date. Patch already available (2026-02-10)
What Undercode Say:
Analytics:
The vulnerability is remotely exploitable with a CVSS base score of 7.5, indicating a high severity due to the network attack vector and lack of required privileges . While no public exploit is confirmed as of the publication date, the attack complexity is low, making it accessible to unauthenticated attackers on the network . The primary impact is the disclosure of highly sensitive data such as IoT Hub connection strings and SAS tokens .
Exploit:
While a specific Proof of Concept (PoC) is not publicly available, the exploitation logic would involve scanning for hosts running the vulnerable Azure IoT Explorer service and sending unauthenticated requests to the exposed endpoint to retrieve sensitive data. Below are hypothetical command examples based on the vulnerability class.
Example 1: Use Nmap to scan for hosts with the Azure IoT Explorer service on a common port (theoretical) nmap -p <port> --script banner <target_IP_range> Example 2: Use cURL to attempt an unauthenticated GET request to a suspected API endpoint curl http://<target_IP>:<port>/api/deviceconnections Example 3: Searching local files for exposed connection strings on a compromised host grep -r "HostName=.;SharedAccessKey=" /users//Documents/
Protection from this CVE
- Update: Immediately update Azure IoT Explorer to version 0.15.13 or later .
- Firewall Rules: Block inbound connections to the application from untrusted networks using host-based firewalls .
- Credential Rotation: Rotate all IoT Hub connection strings and tokens that may have been accessible .
- Network Segmentation: Isolate development workstations running this tool from untrusted networks (e.g., public Wi-Fi) .
Impact
Successful exploitation allows an unauthenticated attacker to disclose sensitive information such as device keys and connection strings, which could lead to further compromise of Azure IoT Hub resources . This can result in unauthorized data access from devices, device impersonation, and manipulation of telemetry streams .
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Sources:
Reported By: nvd.nist.gov
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