CVE-2026-23662
Published: 10 March 2026
Summary
CVE-2026-23662 is a high-severity Missing Authentication for Critical Function (CWE-306) vulnerability in Microsoft Azure Iot Explorer. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 24.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Mandating that external services employ specified authentication controls and ongoing compliance monitoring makes missing authentication for critical functions harder to overlook or exploit.
Requiring authorization before VoIP deployment prevents critical VoIP functions (registration, call setup) from lacking authentication.
Requires established identification and authentication to unlock, mitigating missing authentication for continued system access.
Requiring identification and rationale for actions allowed without authentication ensures critical functions are not left unprotected by forcing review of authentication requirements.
Authorizing mobile device connections to organizational systems ensures authentication is performed for this critical access function.
Guarantees critical functions are protected by mandatory invocation of the access control mechanism.
Role-based training covers secure transmission methods, mitigating cleartext transmission of sensitive data.
Auditing sessions makes it possible to detect access to critical functions without required authentication.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Missing authentication (CWE-306) for a remotely accessible critical function in Azure IoT Explorer directly enables unauthenticated exploitation of a public-facing application, resulting in sensitive information disclosure.
NVD Description
Missing authentication for critical function in Azure IoT Explorer allows an unauthorized attacker to disclose information over a network.
Deeper analysisAI
CVE-2026-23662 is a missing authentication vulnerability affecting a critical function in Azure IoT Explorer. This flaw, associated with CWE-306 (Missing Authentication for Critical Function) and CWE-319 (Cleartext Transmission of Sensitive Information), enables unauthorized information disclosure over a network. The vulnerability received a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high severity due to its network accessibility, low complexity, and lack of required privileges or user interaction.
An unauthorized attacker can exploit this vulnerability remotely without authentication by accessing the unprotected critical function in Azure IoT Explorer. Successful exploitation results in high-impact confidentiality loss, allowing the attacker to disclose sensitive information transmitted in cleartext over the network, while integrity and availability remain unaffected.
Microsoft's security response center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23662 details recommended mitigations and available patches for addressing this vulnerability in Azure IoT Explorer. Security practitioners should consult this guide for deployment instructions and verify system updates.
Details
- CWE(s)