Answer in brief
CVE-2026-20167 records a High severity (CVSS 7.7) vulnerability in Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco IoT Field Network Director (IoT-FND) (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco IoT Field Network Director (IoT-FND) (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco IoT Field Network Director (IoT-FND)generic | 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 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-20167 records a High severity (CVSS 7.7) vulnerability in Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco IoT Field Network Director (IoT-FND) (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco IoT Field Network Director (IoT-FND) (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco IoT Field Network Director (IoT-FND)generic | 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 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
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.
Quoted source text, attributed separately from HOL analysis.