TI-2019-01577 Aliases CVE-2019-1957 GHSA-rmxg-r6q3-64j3

Cisco IoT Field Network Director TLS Renegotiation Denial of Service Vulnerability

MEDIUM 43CWE-399Published 2019-08-08 · Updated 2024-11-19

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: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the web interface of Cisco IoT Field Network Director could allow an unauthenticated, remote attacker to trigger high CPU usage, resulting in a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of Transport Layer Security (TLS) renegotiation requests. An attacker could exploit this vulnerability by sending renegotiation requests at a high rate. A successful exploit could increase the resource usage on the system, eventually leading to a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01967 80th 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 IoT Field Network Director (IoT-FND)	all versions	—	No fix listed	CNA

Cisco IoT Field Network Director (IoT-FND) VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:iot_field_network_director::::::::	before 4.4.2-11	Vulnerable	Cisco

cpe:2.3:a:cisco:iot_field_network_director:*:*:*:*:*:*:*:* Versions before 4.4.2-11 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-1957
2026-10-03 Alias added: GHSA-rmxg-r6q3-64j3

References

Advisory 1

20190807 Cisco IoT Field Network Director TLS Renegotiation Denial of Service Vulnerability

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2020-03077 Cisco IoT Field Network Director Unauthenticated REST API Vulnerability CVSS 3.1CRITICAL 9.8
TI-2019-01270 Cisco IoT Field Network Director Resource Exhaustion Denial of Service Vulnerability CVSS 3.1HIGH 7.5
TI-2020-15928 Cisco IoT Field Network Director Information Disclosure Vulnerability CVSS 3.1HIGH 7.5
TI-2020-15924 Cisco IoT Field Network Director SOAP API Authorization Bypass Vulnerability CVSS 3.1HIGH 8.7
TI-2020-02943 Cisco IoT Field Network Director Missing API Authentication Vulnerability CVSS 3.1HIGH 7.5

See all 19 →

Sources

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