CVE-2017-17668

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-20 · updated 2026-06-17
Weakness: CWE-863

Description

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.

Affected products

NCR S1 Dispenser Controller Firmware: before 0x0156 — fixed in 0x0156

How to fix

Upgrade to a fixed version: NCR S1 Dispenser Controller Firmware 0x0156. Check the vendor advisory for mitigations.

References

https://www.ncr.com/sites/default/files/ncr_security_alert_-_2018-04_v3.pdf
https://www.ncr.com/sites/default/files/ncr_security_alert_-_2018-04_v3.pdf

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