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Medium severity5.3NVD Advisory· Published May 6, 2020· Updated Aug 11, 2026

CVE-2020-3188

CVE-2020-3188

Description

A vulnerability in how Cisco Firepower Threat Defense (FTD) Software handles session timeouts for management connections could allow an unauthenticated, remote attacker to cause a buildup of remote management connections to an affected device, which could result in a denial of service (DoS) condition. The vulnerability exists because the default session timeout period for specific to-the-box remote management connections is too long. An attacker could exploit this vulnerability by sending a large and sustained number of crafted remote management connections to an affected device, resulting in a buildup of those connections over time. A successful exploit could allow the attacker to cause the remote management interface or Cisco Firepower Device Manager (FDM) to stop responding and cause other management functions to go offline, resulting in a DoS condition. The user traffic that is flowing through the device would not be affected, and the DoS condition would be isolated to remote management only.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

27
  • Cisco Systems, Inc./Secure Firewall Threat Defense
    cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
    Range: >=6.4.0,<6.4.0.9
  • Cisco Systems, Inc./Asa 5505 Firmware2 versions
    cpe:2.3:o:cisco:asa_5505_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5505_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5505_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5510 Firmware2 versions
    cpe:2.3:o:cisco:asa_5510_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5510_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5510_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5512 X Firmware2 versions
    cpe:2.3:o:cisco:asa_5512-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5512-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5512-x_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5515 X Firmware2 versions
    cpe:2.3:o:cisco:asa_5515-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5515-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5515-x_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5520 Firmware2 versions
    cpe:2.3:o:cisco:asa_5520_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5520_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5520_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5525 X Firmware2 versions
    cpe:2.3:o:cisco:asa_5525-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5525-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5525-x_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5540 Firmware2 versions
    cpe:2.3:o:cisco:asa_5540_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5540_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5540_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5545 X Firmware2 versions
    cpe:2.3:o:cisco:asa_5545-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5545-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5545-x_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5550 Firmware2 versions
    cpe:2.3:o:cisco:asa_5550_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5550_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5550_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5555 X Firmware2 versions
    cpe:2.3:o:cisco:asa_5555-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5555-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5555-x_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5580 Firmware2 versions
    cpe:2.3:o:cisco:asa_5580_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5580_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5580_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Asa 5585 X Firmware2 versions
    cpe:2.3:o:cisco:asa_5585-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:asa_5585-x_firmware:101.6\(1.96\):*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:asa_5585-x_firmware:9.8\(3\):*:*:*:*:*:*:*
  • Cisco Systems, Inc./Firepower Threat Defense Softwarellm-fuzzy2 versions
    (expand)+ 1 more
    • (no CPE)
    • (no CPE)range: n/a

Patches

Vulnerability mechanics

References

1

News mentions

0

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