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TI-2016-05521 Aliases CVE-2016-6439GHSA-vh9x-xmvx-jwv7

Resource management flaw in Cisco Firepower System Software before 6.0.1

Priority LOW 36CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the detection engine reassembly of HTTP packets for Cisco Firepower System Software before 6.0.1 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the Snort process unexpectedly restarting. The vulnerability is due to improper handling of an HTTP packet stream. An attacker could exploit this vulnerability by sending a crafted HTTP packet stream to the detection engine on the targeted device. An exploit could allow the attacker to cause a DoS condition if the Snort process restarts and traffic inspection is bypassed or traffic is dropped.

Why it matters now

EPSS 0.01633 76th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Cisco Firepower System Software before 6.0.1Cisco Firepower System Software before 6.0.1—No fix listedCNA
  • Cisco Firepower System Software before 6.0.1 Vendor— Affected Cisco Firepower System Software before 6.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 24

CPEVersionsRoleVendor
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0:*:*:*:*:*:*:*5.3.0VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0.2:*:*:*:*:*:*:*5.3.0.2VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0.3:*:*:*:*:*:*:*5.3.0.3VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0.4:*:*:*:*:*:*:*5.3.0.4VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1:*:*:*:*:*:*:*5.3.1VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.3:*:*:*:*:*:*:*5.3.1.3VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.4:*:*:*:*:*:*:*5.3.1.4VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.5:*:*:*:*:*:*:*5.3.1.5VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.6:*:*:*:*:*:*:*5.3.1.6VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.0:*:*:*:*:*:*:*5.4.0VulnerableCisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0:*:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0.2:*:*:*:*:*:*:* Versions 5.3.0.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0.3:*:*:*:*:*:*:* Versions 5.3.0.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.0.4:*:*:*:*:*:*:* Versions 5.3.0.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1:*:*:*:*:*:*:* Versions 5.3.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.3:*:*:*:*:*:*:* Versions 5.3.1.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.4:*:*:*:*:*:*:* Versions 5.3.1.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.5:*:*:*:*:*:*:* Versions 5.3.1.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.3.1.6:*:*:*:*:*:*:* Versions 5.3.1.6 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.0:*:*:*:*:*:*:* Versions 5.4.0 Vulnerable ·Cisco
Show 14 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.0.2:*:*:*:*:*:*:*5.4.0.2VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1:*:*:*:*:*:*:*5.4.1VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.1:*:*:*:*:*:*:*5.4.1.1VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.2:*:*:*:*:*:*:*5.4.1.2VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.3:*:*:*:*:*:*:*5.4.1.3VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.4:*:*:*:*:*:*:*5.4.1.4VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.5:*:*:*:*:*:*:*5.4.1.5VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.6:*:*:*:*:*:*:*5.4.1.6VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:5.4_base:*:*:*:*:*:*:*5.4_baseVulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0:*:*:*:*:*:*:*6.0.0VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0.0:*:*:*:*:*:*:*6.0.0.0VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0.1:*:*:*:*:*:*:*6.0.0.1VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.0.1:*:*:*:*:*:*:*6.0.1VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.0_base:*:*:*:*:*:*:*6.0_baseVulnerableCisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.0.2:*:*:*:*:*:*:* Versions 5.4.0.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1:*:*:*:*:*:*:* Versions 5.4.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.1:*:*:*:*:*:*:* Versions 5.4.1.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.2:*:*:*:*:*:*:* Versions 5.4.1.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.3:*:*:*:*:*:*:* Versions 5.4.1.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.4:*:*:*:*:*:*:* Versions 5.4.1.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.5:*:*:*:*:*:*:* Versions 5.4.1.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4.1.6:*:*:*:*:*:*:* Versions 5.4.1.6 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:5.4_base:*:*:*:*:*:*:* Versions 5.4_base Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0:*:*:*:*:*:*:* Versions 6.0.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0.0:*:*:*:*:*:*:* Versions 6.0.0.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:6.0.0.1:*:*:*:*:*:*:* Versions 6.0.0.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:6.0.1:*:*:*:*:*:*:* Versions 6.0.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_management_center:6.0_base:*:*:*:*:*:*:* Versions 6.0_base Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-6439
  2. 2026-10-03 Alias added: GHSA-vh9x-xmvx-jwv7

References

Advisory 1

  • 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