How severe is CVE-2017-8859?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Veritas Netbackup Appliance

CVE-2017-8859

In Veritas NetBackup Appliance 3.0 and earlier, unauthenticated users can execute arbitrary commands as root.

Published 2017-05-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.026 (84.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Veritas Netbackup Appliance — versions 2.7.3, 3.0

References

www.securityfocus.com/bid/98383 (VDB Entry, Third Party Advisory, vdb-entry)
www.veritas.com/content/support/en_US/security/VTS17-005.html (Vendor Advisory)

Frequently asked questions

What is CVE-2017-8859?: CVE-2017-8859 is a critical-severity vulnerability in Veritas Netbackup Appliance. CVSS score: 9.8/10. Published 2017-05-09.
How severe is CVE-2017-8859?: Critical severity. CVSS v3 base score is 9.8 out of 10.