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TI-2019-01321 Aliases CVE-2019-1695GHSA-96r8-3qv9-q756

Cisco Adaptive Security Appliance and Firepower Threat Defense Software Layer 2 Filtering Bypass Vulnerability

Priority LOW 30CWE-284Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

A vulnerability in the detection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to send data directly to the kernel of an affected device. The vulnerability exists because the software improperly filters Ethernet frames sent to an affected device. An attacker could exploit this vulnerability by sending crafted packets to the management interface of an affected device. A successful exploit could allow the attacker to bypass the Layer 2 (L2) filters and send data directly to the kernel of the affected device. A malicious frame successfully delivered would make the target device generate a specific syslog entry.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00712 53rd percentileScored 2026-11-07
Fix Fixed Cisco Adaptive Security Appliance (ASA) Software (Cisco): 9.8.4, 9.9.2.50, 9.10.1.17Cisco Firepower Threat Defense (FTD) Software (Cisco): 6.2.3.12, 6.3.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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 Adaptive Security Appliance (ASA) Softwarebefore 9.8.4; before 9.9.2.50; before 9.10.1.179.8.4, 9.9.2.50, 9.10.1.17Patch availableCNA
CiscoCisco Firepower Threat Defense (FTD) Softwarebefore 6.2.3.12; before 6.3.0.36.2.3.12, 6.3.0.3Patch availableCNA
  • Cisco Adaptive Security Appliance (ASA) Software VendorCisco Affected before 9.8.4; before 9.9.2.50; before 9.10.1.17 Fixed in 9.8.4, 9.9.2.50, 9.10.1.17 Patch available CNA
  • Cisco Firepower Threat Defense (FTD) 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 · 7

CPEVersionsRoleVendor
cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*before 9.8.4VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*6.2.1 to before 6.2.3.12; 6.3.0 to before 6.3.0.3VulnerableCisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*9.9 to before 9.9.2.50; 9.10 to before 9.10.1.17VulnerableCisco
cpe:2.3:h:cisco:firepower_2110:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:firepower_2120:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:firepower_2130:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:firepower_2140:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* Versions before 9.8.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions 6.2.1 to before 6.2.3.12; 6.3.0 to before 6.3.0.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* Versions 9.9 to before 9.9.2.50; 9.10 to before 9.10.1.17 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:firepower_2110:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:firepower_2120:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:firepower_2130:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:firepower_2140:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

  • Fix · CNA Cisco Adaptive Security Appliance (ASA) Software (Cisco) Fixed in 9.8.4, 9.9.2.50, 9.10.1.17
  • Fix · CNA Cisco Firepower Threat Defense (FTD) Software (Cisco) Fixed in 6.2.3.12, 6.3.0.3

Fixed in the same release

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

  • Release ·

    Cisco Firepower Threat Defense (FTD) Software 6.2.3.12, 6.3.0.3

    8 records Highest priority Priority MEDIUM 4 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2019-01320 Improper input validation in Cisco Adaptive Security Appliance SoftwarePriority MEDIUM 48
    • TI-2019-01340 Credentials management flaw in Cisco Adaptive Security Appliance SoftwarePriority MEDIUM 47
    • TI-2019-01334 Memory leak in Cisco Adaptive Security Appliance SoftwarePriority MEDIUM 47
    Show all 8 records →
  • Release ·

    Cisco Adaptive Security Appliance (ASA) Software 9.10.1.17, 9.8.4, 9.9.2.50

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2019-01340 Credentials management flaw in Cisco Adaptive Security Appliance SoftwarePriority MEDIUM 47
    • TI-2019-01334 Memory leak in Cisco Adaptive Security Appliance SoftwarePriority MEDIUM 47
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-1695
  2. 2026-10-03 Alias added: GHSA-96r8-3qv9-q756

References

Advisory 1

  • TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
  • TI-2016-05454 Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on… KEVCVSS 3.1HIGH 8.8
  • 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 354 →

Sources

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