Information disclosure in Microsoft Azure Functions

CVE-2026-21532

Azure Function Information Disclosure Vulnerability

Vulnerability class: Information Disclosure

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-21532: held from 0.008 to 0.009.

EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-21532?
CVE-2026-21532 is a high-severity vulnerability in Microsoft Azure Functions, classified under Information Disclosure. CVSS score: 8.2/10. Published 2026-02-05.
How severe is CVE-2026-21532?
High severity. CVSS v3 base score is 8.2 out of 10.