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CVE-2019-16028

32
FAUCET Score

CVE-2019-16028 is a critical authentication bypass vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC). An unauthenticated, remote attacker can exploit this flaw by sending crafted HTTP requests, leveraging improper handling of LDAP authentication responses to gain administrative privileges. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, allowing for complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, it has garnered some community discussion and media coverage, indicating awareness of its significant risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.2.3.16CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*
>= 6.3.0, < 6.3.0.6CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*
>= 6.4.0, < 6.4.0.7CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*
>= 6.5.0, < 6.5.0.2CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.35%
Probability of exploitation in next 30 days
EPSS Percentile
87.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0335 is in the 79th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-fmc-auth
Vendor Advisory