TI-2026-16375 Aliases CVE-2026-20167 GHSA-48h9-c48p-4x99

Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability

LOW 33CWE-284Published 2026-05-06 · Updated 2026-05-06

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

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

Summary

A vulnerability in the web-based management interface of Cisco IoT Field Network Director could allow an authenticated, remote attacker with low privileges to cause a DoS condition on a remotely managed router. This vulnerability is due to improper error handling. An attacker could exploit this vulnerability by submitting crafted input to the web-based management interface. A successful exploit could allow the attacker to request unauthorized files from a remote router, causing the router to reload and resulting in a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00272 19th 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: 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco IoT Field Network Director (IoT-FND)	4.5.1; 4.4.3; 4.1.0; 4.1.3; 4.6.1; 4.1.1; 4.4.0; 4.2.0; 4.4.2; 4.3.0; 4.6.0; 4.4.4; 4.3.2; 4.1.2; 4.4.1; 4.5.0; 4.3.1; 4.7.0; 4.6.2; 4.7.1; 4.7.2; 4.8.0; 4.8.1; 4.9.0; 4.9.1; 4.10.0; 4.9.2; 4.11.0; 4.12.0; 4.12.1	—	No fix listed	CNA

Cisco IoT Field Network Director (IoT-FND) VendorCisco Affected 4.5.1; 4.4.3; 4.1.0; 4.1.3; 4.6.1; 4.1.1; 4.4.0; 4.2.0; 4.4.2; 4.3.0; 4.6.0; 4.4.4; 4.3.2; 4.1.2; 4.4.1; 4.5.0; 4.3.1; 4.7.0; 4.6.2; 4.7.1; 4.7.2; 4.8.0; 4.8.1; 4.9.0; 4.9.1; 4.10.0; 4.9.2; 4.11.0; 4.12.0; 4.12.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:iot_field_network_director::::::::	before 5.0.0-117	Vulnerable	Cisco

cpe:2.3:a:cisco:iot_field_network_director:*:*:*:*:*:*:*:* Versions before 5.0.0-117 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-20167
2026-10-03 Alias added: GHSA-48h9-c48p-4x99

References

Advisory 1

cisco-sa-iot-fnd-dos-n8N26Q4u

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-2019-01577 Cisco IoT Field Network Director TLS Renegotiation Denial of Service Vulnerability CVSS 3.1HIGH 7.5
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

See all 19 →

Sources

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