CVE-2026-26121: SSRF in Azure IoT Explorer

The SSRF vulnerability in Azure IoT Explorer allows an attacker to craft malicious requests that appear to originate from the IoT Explorer application itself. This can be exploited to access internal services and resources that are not directly exposed to the internet. For example, an attacker could potentially access internal APIs, databases, or cloud storage services. The blast radius of this vulnerability is significant, as it could allow an attacker to gain a foothold within the Azure IoT infrastructure and potentially compromise sensitive data or disrupt operations. While no specific real-world exploitation has been publicly reported, SSRF vulnerabilities are frequently targeted by attackers seeking to map internal networks and identify exploitable systems.

1. Reserved2026-02-11
2. Published2026-03-10
3. Modified2026-04-14
4. EPSS updated2026-03-23

The primary mitigation for CVE-2026-26121 is to upgrade Azure IoT Explorer to version 0.15.14 or later. If upgrading is not immediately feasible, consider implementing network segmentation to restrict the IoT Explorer application's access to internal resources. Implement strict input validation and sanitization to prevent attackers from crafting malicious requests. Consider using a Web Application Firewall (WAF) with SSRF protection rules to block suspicious requests. After upgrading, confirm the fix by attempting to trigger an SSRF request and verifying that it is blocked.