CVE-2026-20167 (GCVE-0-2026-20167)
Vulnerability from cvelistv5 – Published: 2026-05-06 16:15 – Updated: 2026-05-06 17:26
VLAI
EPSS
VEX
Title
Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability
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.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 17:25 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco IoT Field Network Director (IoT-FND) |
Affected:
4.5.1
Affected: 4.4.3 Affected: 4.1.0 Affected: 4.1.3 Affected: 4.6.1 Affected: 4.1.1 Affected: 4.4.0 Affected: 4.2.0 Affected: 4.4.2 Affected: 4.3.0 Affected: 4.6.0 Affected: 4.4.4 Affected: 4.3.2 Affected: 4.1.2 Affected: 4.4.1 Affected: 4.5.0 Affected: 4.3.1 Affected: 4.7.0 Affected: 4.6.2 Affected: 4.7.1 Affected: 4.7.2 Affected: 4.8.0 Affected: 4.8.1 Affected: 4.9.0 Affected: 4.9.1 Affected: 4.10.0 Affected: 4.9.2 Affected: 4.11.0 Affected: 4.12.0 Affected: 4.12.1 |
guessed |
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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