How severe is CVE-2018-5717?

CVE-2018-5717 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-5717 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5717?

CVE-2018-5717 affects Ncr S2 Dispenser Controller Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-5717?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-5717 published?

CVE-2018-5717 was published on 2018-03-20 and last updated on 2026-06-17.

CVE-2018-5717

CVE-2018-5717 is a high-severity vulnerability in Ncr S2 Dispenser Controller Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ncr S2 Dispenser Controller Firmware
Published: 2018-03-20
Last modified: 2026-06-17

Description

Memory write mechanism in NCR S2 Dispenser controller before firmware version 0x0108 allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.

Frequently asked questions

What is CVE-2018-5717?: Memory write mechanism in NCR S2 Dispenser controller before firmware version 0x0108 allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.
How severe is CVE-2018-5717?: CVE-2018-5717 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-5717 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5717?: CVE-2018-5717 affects Ncr S2 Dispenser Controller Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-5717?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-5717 published?: CVE-2018-5717 was published on 2018-03-20 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:ncr:s2_dispenser_controller_firmware:*:*:*:*:*:*:*:*

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