CVE-2021-33540 (GCVE-0-2021-33540)
Vulnerability from cvelistv5 – Published: 2021-06-25 18:26 – Updated: 2024-09-17 03:18
VLAI
EPSS
VEX
Title
Phoenix Contact: Undocumented FTP acces in certain AXL F BK and IL BK devices
Summary
In certain devices of the Phoenix Contact AXL F BK and IL BK product families an undocumented password protected FTP access to the root directory exists.
Severity
7.3 (High)
CWE
- CWE-798 - Use of Hard-coded Credentials
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.vde.com/en-us/advisories/vde-2021-021 | x_refsource_CONFIRM |
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Phoenix Contact | AXL F BK |
Affected:
AXL F PN TPS XC (1068857) , < 1.30
(custom)
Affected: AXL F EIP EF (2702782) , < 1.30 (custom) |
guessed | |
| Phoenix Contact | AXL F BK |
Affected:
AXL F PN TPS (2403869) , < 1.30
(custom)
|
guessed | |
| Phoenix Contact | AXL F BK |
Affected:
AXL F EIP (2688394) , < 1.30
(custom)
Affected: AXL F ETH (2688459) , < 1.30 (custom) Affected: AXL F ETH XC (2701949) , < 1.30 (custom) Affected: AXL F S3 (2701686) , < 1.40 (custom) |
guessed | |
| Phoenix Contact | AXL F BK |
Affected:
AXL F PN (2701815) all revisions
Affected: AXL F PN XC (2701222) all revisions Affected: AXL F ETH NET2 (2702177) all revisions Affected: AXL F SAS (2701457) all revisions |
guessed | |
| Phoenix Contact | IL |
Affected:
IL PN BK-PAC (2403696) all revisions
Affected: IL PN BK DI8 DO4 2TX-PAC (2703994) all revisions Affected: IL PN BK DI8 DO4 2SCRJ-PAC (2878379) all revisions Affected: IL ETH BK DI8 DO4 2TX-XC-PAC (2701388) all revisions Affected: IL ETH BK DI8 DO4 2TX-PAC (2703981) all revisions Affected: IL EIP BK DI8 DO4 2TX-PAC (2897758) all revisions Affected: IL S3 BK DI8 DO4 2TX-PAC (2692380) all revisions |
guessed |
Date Public
2021-06-23 00:00
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"value": "En determinados dispositivos de las familias de productos Phoenix Contact AXL F BK e IL BK se presenta un acceso FTP protegido por contrase\u00f1a no documentado al directorio root"
}
],
"id": "CVE-2021-33540",
"lastModified": "2024-11-21T06:09:02.727",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.4,
"source": "info@cert.vde.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.4,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-06-25T19:15:09.697",
"references": [
{
"source": "info@cert.vde.com",
"tags": [
"Third Party Advisory"
],
"url": "https://cert.vde.com/en-us/advisories/vde-2021-021"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://cert.vde.com/en-us/advisories/vde-2021-021"
}
],
"sourceIdentifier": "info@cert.vde.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-798"
}
],
"source": "info@cert.vde.com",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T13:59:07+00:00",
"cve": "CVE-2021-33540",
"id": "CVE-2021-33540",
"initial_release_date": "2021-06-23T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Phoenix Contact: Undocumented FTP acces in certain AXL F BK and IL BK devices",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-33540.json",
"version": "3"
}
}
}
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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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