What is CVE-2026-21532?
Azure Function Information Disclosure Vulnerability
The record classifies CVE-2026-21532 under weakness class CWE-200. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 265 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.2 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N - EPSS (FIRST)
- 0.8% probability of exploitation in the next 30 days, higher than 58.4% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 6.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-02-05, last modified 2026-08-19
Is CVE-2026-21532 being exploited?
It currently carries a trending score of 25 in the Threadlinqs vulnerability feed.
Affected products and versions
- Microsoft: Azure Functions
How to fix CVE-2026-21532
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21532. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-21532
2 tracked threats in the Threadlinqs corpus reference CVE-2026-21532, either in the campaign’s CVE list or as an indicator on the campaign record.
- February 2026 Patch Tuesday: Six Zero-Days Among 59 CVEs — CrowdStrike-Discovered RDP EoP Exploited Since December 2025 — CRITICAL · 2026-02-12
- February 2026 Patch Tuesday: Six Zero-Days Among 59 CVEs — CRITICAL · 2026-02-12
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.