CVE-2019-16028

Cisco Firepower Management Center Lightweight Directory Access Protocol Authentication Bypass Vulnerability

CRITICAL
9.8
CVSS Score
Published: September 23, 2020 at 12:26 AM UTC
Updated: June 17, 2026 at 02:21 AM UTC
2 products affected across 1 vendorSecure Firewall Management CenterFirepower Management Center

Using Cisco Firepower Management Center by Cisco?

Get instant alerts when new vulnerabilities affect Cisco Firepower Management Center - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
CRITICAL9.8
Exploit prediction
EPSS 3%
SSVC
No known exploit

Description

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) could allow an unauthenticated, remote attacker to bypass authentication and execute arbitrary actions with administrative privileges on an affected device. The vulnerability is due to improper handling of Lightweight Directory Access Protocol (LDAP) authentication responses from an external authentication server. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to gain administrative access to the web-based management interface of the affected device.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 6.2.3.166.3.0 ≤ v < 6.3.0.66.4.0 ≤ v < 6.4.0.76.5.0 ≤ v < 6.5.0.2
Affected range stops below 6.2.3.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.0.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.5.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card