How severe is CVE-2018-16591?

CVE-2018-16591 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-16591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16591?

CVE-2018-16591 primarily affects Furuno Felcom 250 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-16591?

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

When was CVE-2018-16591 published?

CVE-2018-16591 was published on 2018-09-10 and last updated on 2026-06-17.

CVE-2018-16591

CVE-2018-16591 is a critical-severity vulnerability in Furuno Felcom 250 Firmware with a CVSS 3.x base score of 9.8. 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-862.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Furuno Felcom 250 Firmware
Published: 2018-09-10
Last modified: 2026-06-17

Description

FURUNO FELCOM 250 and 500 devices allow unauthenticated users to change the password for the Admin, Log and Service accounts, as well as the password for the protected "SMS" panel via /cgi-bin/sm_changepassword.cgi and /cgi-bin/sm_sms_changepasswd.cgi.

Frequently asked questions

What is CVE-2018-16591?: FURUNO FELCOM 250 and 500 devices allow unauthenticated users to change the password for the Admin, Log and Service accounts, as well as the password for the protected "SMS" panel via /cgi-bin/sm_changepassword.cgi and /cgi-bin/sm_sms_changepasswd.cgi.
How severe is CVE-2018-16591?: CVE-2018-16591 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-16591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16591?: CVE-2018-16591 primarily affects Furuno Felcom 250 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-16591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-16591 published?: CVE-2018-16591 was published on 2018-09-10 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:furuno:felcom_250_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:furuno:felcom_500_firmware:-:*:*:*:*:*:*:*

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