Cisco Firepower Threat Defense Software Management Interface Denial of Service Vulnerability
Priority LOW 34CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-613.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01732 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 · 37
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* | 6.4.0 to before 6.4.0.9; 6.5.0 to before 6.5.0.5 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5505_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5505_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5510_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5510_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5510:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5512-x_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5512-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions 6.4.0 to before 6.4.0.9; 6.5.0 to before 6.5.0.5 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5505_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5505_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5510_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5510_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5512-x_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5512-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 27 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:asa_5515-x_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5515-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5520_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5520_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5520:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5525-x_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5525-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5540_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5540_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5540:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5545-x_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5545-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5550_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5550_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5550:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5555-x_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5555-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5580_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5580_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:asa_5585-x_firmware:9.8\(3\):*:*:*:*:*:*:* | 9.8(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asa_5585-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* | 101.6(1.96) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:asa_5515-x_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5515-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5520_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5520_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5520:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5525-x_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5525-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5540_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5540_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5540:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5545-x_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5545-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5550_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5550_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5550:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5555-x_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5555-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5580_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5580_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:asa_5585-x_firmware:9.8\(3\):*:*:*:*:*:*:* Versions 9.8(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:asa_5585-x_firmware:101.6\(1.96\):*:*:*:*:*:*:* Versions 101.6(1.96) Vulnerable ·Cisco
- cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-3188
- 2026-10-03 Alias added: GHSA-624j-v5v7-qjpg
References
More Cisco Asa 5505 Firmware vulnerabilities
- TI-2020-02748 Path traversal in Cisco Adaptive Security Appliance Software CVSS 3.1CRITICAL 9.1
- TI-2021-17312 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2020-02841 Cisco Firepower 1000 Series SSL/TLS Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2020-02757 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2020-02752 Improper input validation in Cisco Adaptive Security Appliance Software CVSS 3.1HIGH 8.6
- TI-2020-02750 Cisco Firepower Threat Defense Software VPN System Logging Denial of Service Vulnerability CVSS 3.1HIGH 8.6
Sources
- CVE-2020-3188 · CVE Program
- CVE-2020-3188 · NVD
- FIRST EPSS
- GHSA-624j-v5v7-qjpg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences