What is CVE-2017-17668?

CVE-2017-17668 is a high-severity vulnerability in Ncr S1 Dispenser Controller, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2018-03-20.

How severe is CVE-2017-17668?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Ncr S1 Dispenser Controller

CVE-2017-17668

Memory write mechanism in NCR S1 Dispenser controller before firmware version 0x0156 allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.

Vulnerability class: Broken Access Control

Published 2018-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.ncr.com/sites/default/files/ncr_security_alert_-_2018-04_v3.pdf (Broken Link, Vendor Advisory)

Frequently asked questions

What is CVE-2017-17668?: CVE-2017-17668 is a high-severity vulnerability in Ncr S1 Dispenser Controller, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2018-03-20.
How severe is CVE-2017-17668?: High severity. CVSS v3 base score is 7.5 out of 10.