What is CVE-2016-8520?

CVE-2016-8520 is a high-severity vulnerability in Eucalyptus, classified under Permission Issues. CVSS score: 8.8/10. Published 2018-02-15.

How severe is CVE-2016-8520?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Eucalyptus

CVE-2016-8520

HPE Helion Eucalyptus v4.3.0 and earlier does not correctly check IAM user's permissions for accessing versioned objects and ACLs. In some cases, authenticated users with S3 permissions could also access versioned data.

Published 2018-02-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (70.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Eucalyptus
Hewlett Packard Enterprise Helion Eucalyptus — versions v4.3.0 and earlier

Weakness classification (CWE)

CWE-275 — Permission Issues

References

www.securityfocus.com/bid/95369 (VDB Entry, Third Party Advisory, vdb-entry)
support.hpe.com/hpsc/doc/public/display (Vendor Advisory)

Frequently asked questions

What is CVE-2016-8520?: CVE-2016-8520 is a high-severity vulnerability in Eucalyptus, classified under Permission Issues. CVSS score: 8.8/10. Published 2018-02-15.
How severe is CVE-2016-8520?: High severity. CVSS v3 base score is 8.8 out of 10.