What is CVE-2026-70340?

CVE-2026-70340 is a high-severity vulnerability in Microsoft Azure Cyclecloud, 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

CVE-2026-70340

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

Vulnerability class: Broken Access Control

Published 2026-08-11 · last modified 2026-08-17.

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.

EPSS exploit prediction

EPSS: 0.008 (54.7th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.008 · change: +0.002

Affected products

Microsoft Azure Cyclecloud
Microsoft Azure Cyclecloud 8.9.1 — versions 1.0.0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Azure CycleCloud Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-70340?: CVE-2026-70340 is a high-severity vulnerability in Microsoft Azure Cyclecloud, 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.