TI-2019-01456 Aliases CVE-2019-1833 GHSA-6ffw-22x4-4x3r

Cisco Firepower Threat Defense Software SSL/TLS Policy Bypass Vulnerability

LOW 35CWE-693Published 2019-05-16 · Updated 2024-11-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-693.

Summary

A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) protocol parser of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies. The vulnerability is due to improper parsing of specific attributes in a TLS packet header. An attacker could exploit this vulnerability by sending malicious TLS messages to the affected system. A successful exploit could allow the attacker to bypass the configured policies for the system, which could allow traffic to flow through without being inspected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0171 77th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Firepower Threat Defense Software	all versions	—	No fix listed	CNA

Cisco Firepower Threat Defense Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:secure_firewall_management_center:6.1.0:::::::*	6.1.0	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.0:::::::*	6.2.0	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.1:::::::*	6.2.1	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.2:::::::*	6.2.2	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3:::::::*	6.2.3	Vulnerable	Cisco

cpe:2.3:a:cisco:secure_firewall_management_center:6.1.0:*:*:*:*:*:*:* Versions 6.1.0 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.0:*:*:*:*:*:*:* Versions 6.2.0 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.1:*:*:*:*:*:*:* Versions 6.2.1 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.2:*:*:*:*:*:*:* Versions 6.2.2 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3:*:*:*:*:*:*:* Versions 6.2.3 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2019-05-16
Cisco Firepower Threat Defense Software n/a
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2019-01455 Cisco Firepower Threat Defense Software Detection Engine Policy Bypass VulnerabilityPriority MEDIUM 42
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2019-1833
2026-10-03 Alias added: GHSA-6ffw-22x4-4x3r

References

Advisory 1

20190515 Cisco Firepower Threat Defense Software SSL/TLS Policy Bypass Vulnerability

TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16292 Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16502 Cisco Secure Firewall Management Center Software Static Credential Vulnerability KEVCVSS 3.1MEDIUM 5.3
TI-2016-05515 The Threat Management Console in Cisco Firepower Management Center 5.2.0 through 6.0.1… CVSS 3.1HIGH 8.8
TI-2025-14563 Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability CVSS 3.1CRITICAL 10.0
TI-2023-06757 Improper privilege management in Cisco Firepower Management Center CVSS 3.1CRITICAL 9.9

See all 186 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences