CVE-2025-20339 (GCVE-0-2025-20339)
Vulnerability from cvelistv5 – Published: 2025-09-24 16:40 – Updated: 2025-09-24 17:04
VLAI
EPSS
VEX
Title
Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
Summary
A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL.
This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-24 17:03 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco SD-WAN vEdge Cloud |
Affected:
20.9.1
Affected: 20.9.1.1 Affected: 20.9.2 Affected: 20.9.3 Affected: 20.9.3.1 Affected: 20.9.2.2 Affected: 20.9.2.3 Affected: 20.9.4 Affected: 20.9.5 Affected: 20.9.5.1 Affected: 20.9.6 Affected: 20.9.5.3 |
guessed | |
| Cisco | Cisco SD-WAN vEdge Router |
Affected:
20.3.1
Affected: 20.3.2 Affected: 20.4.1 Affected: 20.4.1.1 Affected: 20.3.3 Affected: 20.4.1.2 Affected: 20.4.2 Affected: 20.3.4 Affected: 20.3.5 Affected: 20.9.1 Affected: 20.3.6 Affected: 20.9.2 Affected: 20.3.7 Affected: 20.9.3 Affected: 20.3.3.2 Affected: 20.3.4.3 Affected: 20.9.3.1 Affected: 20.3.7.1 Affected: 20.3.5.1 Affected: 20.4.2.3 Affected: 20.9.2.2 Affected: 20.3.7.2 Affected: 20.9.2.3 Affected: 20.9.4 Affected: 20.12.1 Affected: 20.3.8 Affected: 20.9.4.1777 Affected: 20.9.5 Affected: 20.9.5.1 Affected: 20.12.3.1 Affected: 20.9.6 Affected: 20.9.5.3 |
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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