CVE•Published 2026-05-12•Modified 2026-05-21•2 articles on news•5 live references•NVD data

CVE-2026-40379Microsoft · Entra_id

Vulnerability data via NVD (ingested)

CVSS v3.1

9.3

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Description

Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.

Timeline

Published 2026-05-12

Modified 2026-05-21

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-40379

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Microsoft Entra Id"

All exposed Microsoft Entra Id instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Entra Id"

HTTP body or banner mentions "Entra Id" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-40379

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2026-40379

Censys host search filtered to this CVE id.

grep.app

CVE-2026-40379

Public source-code mentions — fast PoC discovery.

GitHub code

CVE-2026-40379

GitHub code search for direct mentions.

Google dork

"CVE-2026-40379" exploit -site:nvd.nist.gov

Write-ups and news, NVD excluded.

Known PoCs on GitHub

No public proof-of-concept repositories found for CVE-2026-40379 on GitHub.