CVE-2026-26121 Azure IOT Explorer Spoofing Vulnerability

High 7.5 Published 10 Mar 2026 Updated 19 Jun 2026

An unauthorized attacker can exploit a server-side request forgery flaw in Azure IoT Explorer to perform spoofing attacks over the network.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-26121?

CVE-2026-26121 is a high-severity server-side request forgery vulnerability in Microsoft Azure IoT Explorer, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Server-side request forgery (ssrf) in Azure IoT Explorer allows an unauthorized attacker to perform spoofing over a network.

Weakness: CWE-918, CWE-20

Which versions are affected by CVE-2026-26121?

It affects 1 product.

Products include Microsoft Azure Iot Explorer.

How do I fix CVE-2026-26121?

No fix has been published for CVE-2026-26121 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-26121 being exploited?

There is no known exploitation of CVE-2026-26121 in the wild and no public exploit code.

Sources

Also known as GHSA-vg48-j87h-hc85.