What is CVE-2026-26121?

CVE-2026-26121 is a high-severity vulnerability in Microsoft Azure Iot Explorer, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-03-10.

How severe is CVE-2026-26121?

High severity. CVSS v3 base score is 7.5 out of 10.

SSRF in Microsoft Azure Iot Explorer

CVE-2026-26121

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

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-03-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.3th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.011 · change: +0.000

Affected products

Microsoft Azure Iot Explorer — versions 1.0.0
Microsoft Azure Iot Explorer

Weakness classification (CWE)

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26121 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-26121?: CVE-2026-26121 is a high-severity vulnerability in Microsoft Azure Iot Explorer, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-03-10.
How severe is CVE-2026-26121?: High severity. CVSS v3 base score is 7.5 out of 10.