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TI-2018-11022 Aliases CVE-2018-15462GHSA-j9qq-8x6v-fqhq

Cisco Firepower Threat Defense Software TCP Ingress Handler Denial of Service Vulnerability

Priority MEDIUM 47CWE-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
Fixed

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

Summary

A vulnerability in the TCP ingress handler for the data interfaces that are configured with management access to Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an increase in CPU and memory usage, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient ingress TCP rate limiting for TCP ports 22 (SSH) and 443 (HTTPS). An attacker could exploit this vulnerability by sending a crafted, steady stream of TCP traffic to port 22 or 443 on the data interfaces that are configured with management access to the affected device.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02073 81st percentileScored 2026-11-07
Fix Fixed Cisco Firepower Threat Defense Software (Cisco): 6.2.3.12, 6.3.0.3

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

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Firepower Threat Defense Softwarebefore 6.2.3.12; before 6.3.0.36.2.3.12, 6.3.0.3Patch availableCNA
  • Cisco Firepower Threat Defense Software VendorCisco Affected before 6.2.3.12; before 6.3.0.3 Fixed in 6.2.3.12, 6.3.0.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*before 6.2.3.12; 6.3.0 to before 6.3.0.3VulnerableCisco
  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions before 6.2.3.12; 6.3.0 to before 6.3.0.3 Vulnerable ·Cisco

Remediation

  • Fix · CNA Cisco Firepower Threat Defense Software (Cisco) Fixed in 6.2.3.12, 6.3.0.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-15462
  2. 2026-10-03 Alias added: GHSA-j9qq-8x6v-fqhq

References

Advisory 1

  • TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2023-06973 Authentication bypass in Cisco Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.1
  • TI-2026-82192 Denial of service in Cisco Secure Firewall ASA and FTD SSL VPN KEVCVSS 3.1HIGH 8.6
  • TI-2026-16533 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense… KEVCVSS 3.1HIGH 8.6
  • TI-2025-14657 Missing authorization in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1HIGH 8.6
See all 276 →

Sources

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