How severe is CVE-2018-3969?

CVE-2018-3969 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-3969 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3969?

CVE-2018-3969 affects Getcujo Smart Firewall. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3969?

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-2018-3969 published?

CVE-2018-3969 was published on 2019-03-21 and last updated on 2026-06-17.

CVE-2018-3969

CVE-2018-3969 is a high-severity vulnerability in Getcujo Smart Firewall with a CVSS 3.x base score of 7.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Getcujo Smart Firewall
Published: 2019-03-21
Last modified: 2026-06-17

Description

An exploitable vulnerability exists in the verified boot protection of the CUJO Smart Firewall. It is possible to add arbitrary shell commands into the dhcpd.conf file, that persist across reboots and firmware updates, and thus allow for executing unverified commands. To trigger this vulnerability, a local attacker needs to be able to write into /config/dhcpd.conf.

Frequently asked questions

What is CVE-2018-3969?: An exploitable vulnerability exists in the verified boot protection of the CUJO Smart Firewall. It is possible to add arbitrary shell commands into the dhcpd.conf file, that persist across reboots and firmware updates, and thus allow for executing unverified commands. To trigger this vulnerability, a local attacker needs to be able to write into /config/dhcpd.conf.
How severe is CVE-2018-3969?: CVE-2018-3969 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-3969 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3969?: CVE-2018-3969 affects Getcujo Smart Firewall. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3969?: 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-2018-3969 published?: CVE-2018-3969 was published on 2019-03-21 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0634

Affected products (1)

cpe:2.3:a:getcujo:smart_firewall:7003:*:*:*:*:*:*:*

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CVE-2018-4031 — Critical (CVSS 10.0): An exploitable vulnerability exists in the safe browsing function of the CUJO Smart Firewall, version 7003. The flaw…
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