What is CVE-2026-70340?

CVE-2026-70340 is a high-severity vulnerability in Microsoft Azure Cyclecloud 8.9.1, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-08-11.

How severe is CVE-2026-70340?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Microsoft Azure Cyclecloud 8.9.1

CVE-2026-70340

Missing authorization in Azure CycleCloud allows an authorized attacker to elevate privileges over a network.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Microsoft Azure Cyclecloud 8.9.1 — versions 1.0.0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-70340?: CVE-2026-70340 is a high-severity vulnerability in Microsoft Azure Cyclecloud 8.9.1, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-08-11.
How severe is CVE-2026-70340?: High severity. CVSS v3 base score is 8.1 out of 10.