Cisco IoT Field Network Director File Overwrite Vulnerability

published 2020-11-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18708

cvss: 4.9; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

A vulnerability in the file system of Cisco IoT Field Network Director (FND) could allow an authenticated, remote attacker to overwrite files on an affected system. The vulnerability is due to insufficient file system protections. An attacker could exploit this vulnerability by crafting API requests and sending them to an affected system. A successful exploit could allow the attacker to overwrite files on an affected system.

Patch / fix

fixed in 1

cisco iot_field_network_director 4.6.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago (2024-11-13)

Exploit prediction

1.45% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.9	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
NVD	2.0	5.5	AV:N/AC:L/Au:S/C:N/I:P/A:P

Affected products

Cisco Cisco IoT Field Network Director (IoT-FND)

Classification

Weakness

CWE-73 External Control of File Name or Path
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-FND-OVW-SHzOE3Pd
vendor-advisory

Sources

CVE List CVE-2020-26078
NVD CVE-2020-26078

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary