CVE-2026-23661
Published: 10 March 2026
Summary
CVE-2026-23661 is a high-severity Cleartext Transmission of Sensitive Information (CWE-319) vulnerability in Microsoft Azure Iot Explorer. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Network Sniffing (T1040); ranked at the 21.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SC-13 (Cryptographic Protection) and SC-8 (Transmission Confidentiality and Integrity).
Deeper analysis
CVE-2026-23661 is a vulnerability in Azure IoT Explorer involving the cleartext transmission of sensitive information, which allows an unauthorized attacker to disclose that information over a network. Published on 2026-03-10T18:18:14.210, it carries 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) and is associated with CWE-319 (Cleartext Transmission of Sensitive Information).
The vulnerability can be exploited by any unauthorized attacker with network access, requiring low attack complexity, no privileges, and no user interaction. Successful exploitation results in high-impact disclosure of sensitive information transmitted in cleartext, with no effects on system integrity or availability.
Mitigation details are provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23661.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-10583
Vulnerability details
Cleartext transmission of sensitive information in Azure IoT Explorer allows an unauthorized attacker to disclose information over a network.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Cleartext transmission of sensitive data over the network directly enables passive interception via network sniffing.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires protection of the confidentiality of transmitted information over networks, directly preventing cleartext disclosure of sensitive data in Azure IoT Explorer.
Mandates confidentiality protections specifically for transmitted information, comprehensively mitigating the cleartext transmission vulnerability exploited by network attackers.
Implements cryptographic mechanisms to secure communications, directly addressing the lack of encryption in sensitive information transmission by Azure IoT Explorer.