SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

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.

MEDIUM 5.8EPSS 2.50%

Does this matter?

Lower severity and a low EPSS score (2.50%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.0
5.8 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS
2.50% probability · 85th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-693
Affected
cisco/secure firewall management center
Source
psirt@cisco.com
EPSS trend
0%3%5%27 October 2026: 2.50%27 October 202627 October 2026

EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.