CVE-2018-15398

Low

No strong exploitation signal.

CVSS base

4.0 MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS — probability of exploitation (30 days)

1.9%

78.5th percentile

CISA KEV

Not listed

Weakness / dates

CWE-284

Published 2018-10-05 · modified 2026-08-11

CVSS breakdown

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector	N	Network
Attack Complexity	H	High
Privileges Required	N	None
User Interaction	N	None
Scope	C	Changed
Confidentiality	N	None
Integrity	L	Low
Availability	N	None

Timeline

2018-10-05 — Published (NVD)
2026-08-11 — Last modified (NVD)

Description

A vulnerability in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass an access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to errors that could occur when the affected software constructs and applies per-user-override rules. An attacker could exploit this vulnerability by connecting to a network through an affected device that has a vulnerable configuration. A successful exploit could allow the attacker to access resources that are behind the affected device and would typically be protected by the interface ACL.

Affected

cisco

References

Official: NVD · CVE.org