How severe is CVE-2018-0384?

CVE-2018-0384 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2018-0384 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0384?

CVE-2018-0384 primarily affects Cisco Secure Firewall Management Center. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-0384?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-0384 published?

CVE-2018-0384 was published on 2018-07-16 and last updated on 2026-06-17.

CVE-2018-0384

CVE-2018-0384 is a medium-severity vulnerability in Cisco Secure Firewall Management Center with a CVSS 3.x base score of 5.8. 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-693.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
CVSS v2: 5.0
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-693
Affected product: Cisco Secure Firewall Management Center
Published: 2018-07-16
Last modified: 2026-06-17

Description

A vulnerability in the detection engine of Cisco FireSIGHT System Software could allow an unauthenticated, remote attacker to bypass a URL-based access control policy that is configured to block traffic for an affected system. The vulnerability exists because the affected software incorrectly handles TCP packets that are received out of order when a TCP SYN retransmission is issued. An attacker could exploit this vulnerability by sending a maliciously crafted connection through an affected device. A successful exploit could allow the attacker to bypass a URL-based access control policy that is configured to block traffic for the affected system. Cisco Bug IDs: CSCvh84511.

Frequently asked questions

What is CVE-2018-0384?: A vulnerability in the detection engine of Cisco FireSIGHT System Software could allow an unauthenticated, remote attacker to bypass a URL-based access control policy that is configured to block traffic for an affected system. The vulnerability exists because the affected software incorrectly handles TCP packets that are received out of order when a TCP SYN retransmission is issued. An attacker could exploit this vulnerability by sending a maliciously crafted connection through an affected device. A successful exploit could allow the attacker to bypass a URL-based access control policy that is configured to block traffic for the affected system. Cisco Bug IDs: CSCvh84511.
How severe is CVE-2018-0384?: CVE-2018-0384 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2018-0384 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0384?: CVE-2018-0384 primarily affects Cisco Secure Firewall Management Center. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-0384?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-0384 published?: CVE-2018-0384 was published on 2018-07-16 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.2:*:*:*:*:*:*:*

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