CVE-2019-6644

CVE-2019-6644 is a critical-severity vulnerability in F5 Big-ip Local Traffic Manager with a CVSS 3.x base score of 9.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Critical (CVSS 3.x base score 9.4)
• CVSS v2: 6.8
• EPSS exploit prediction: 1% (69th percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: F5 Big-ip Local Traffic Manager
• Published: 2019-09-04
• Last modified: 2026-06-17

Description

Similar to the issue identified in CVE-2018-12120, on versions 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.2, and 12.1.0-12.1.4 BIG-IP will bind a debug nodejs process to all interfaces when invoked. This may expose the process to unauthorized users if the plugin is left in debug mode and the port is accessible.

Frequently asked questions

What is CVE-2019-6644?

Similar to the issue identified in CVE-2018-12120, on versions 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.2, and 12.1.0-12.1.4 BIG-IP will bind a debug nodejs process to all interfaces when invoked. This may expose the process to unauthorized users if the plugin is left in debug mode and the port is accessible.

How severe is CVE-2019-6644?

CVE-2019-6644 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2019-6644 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6644?

CVE-2019-6644 primarily affects F5 Big-ip Local Traffic Manager. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-6644?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-6644 published?

CVE-2019-6644 was published on 2019-09-04 and last updated on 2026-06-17.

References

• https://support.f5.com/csp/article/K75532331

Affected products (39)

• cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_local_traffic_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_local_traffic_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_acceleration_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_acceleration_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_analytics:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_analytics:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_access_policy_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_access_policy_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_security_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_security_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_edge_gateway:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_edge_gateway:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_fraud_protection_service:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_fraud_protection_service:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_global_traffic_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_global_traffic_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_link_controller:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_link_controller:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_policy_enforcement_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_policy_enforcement_manager:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_webaccelerator:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_webaccelerator:14.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_domain_name_system:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_domain_name_system:14.1.0:*:*:*:*:*:*:*

More vulnerabilities in F5 Big-ip Local Traffic Manager

• CVE-2023-41373 — Critical (CVSS 9.9): A directory traversal vulnerability exists in the BIG-IP Configuration Utility that may allow an authenticated attacker…
• CVE-2021-22987 — Critical (CVSS 9.9): On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x…
• CVE-2023-46747 — Critical (CVSS 9.8): Undisclosed requests may bypass configuration utility authentication, allowing an attacker with network access to the…
• CVE-2022-1388 — Critical (CVSS 9.8): On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6,…
• CVE-2021-22991 — Critical (CVSS 9.8): On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and…
• CVE-2021-22992 — Critical (CVSS 9.8): On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x…

All CVEs affecting F5 Big-ip Local Traffic Manager →