FKIE_CVE-2021-27477
Vulnerability from fkie_nvd - Published: 2021-07-01 13:15 - Updated: 2026-06-17 03:44
Severity
Summary
When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P, and PC10GE receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop.
References
| URL | Tags | ||
|---|---|---|---|
| ics-cert@hq.dhs.gov | https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04 | Third Party Advisory, US Government Resource | |
| af854a3a-2127-422b-91ae-364da2661108 | https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04 | Third Party Advisory, US Government Resource |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| jtekt | pc10g-cpu_firmware | * | |
| jtekt | pc10g-cpu | - | |
| jtekt | 2port-efr_firmware | * | |
| jtekt | 2port-efr | - | |
| jtekt | plus_cpu_firmware | * | |
| jtekt | plus_cpu | - | |
| jtekt | plus_ex_firmware | * | |
| jtekt | plus_ex | - | |
| jtekt | plus_ex2_firmware | * | |
| jtekt | plus_ex2 | - | |
| jtekt | plus_efr_firmware | * | |
| jtekt | plus_efr | - | |
| jtekt | plus_efr2_firmware | * | |
| jtekt | plus_efr2 | - | |
| jtekt | plus_2p-efr_firmware | * | |
| jtekt | plus_2p-efr | - | |
| jtekt | pc10p-dp_firmware | * | |
| jtekt | pc10p-dp | - | |
| jtekt | pc10p-dp-io_firmware | * | |
| jtekt | pc10p-dp-io | - | |
| jtekt | plus_bus-ex_firmware | * | |
| jtekt | plus_bus-ex | - | |
| jtekt | nano_10gx_firmware | * | |
| jtekt | nano_10gx | - | |
| jtekt | nano_2et_firmware | * | |
| jtekt | nano_2et | - | |
| jtekt | pc10pe_firmware | * | |
| jtekt | pc10pe | - | |
| jtekt | pc10pe-16\/16p_firmware | * | |
| jtekt | pc10pe-16\/16p | - | |
| jtekt | pc10e_firmware | * | |
| jtekt | pc10e | - | |
| jtekt | fl\/et-t-v2h_firmware | * | |
| jtekt | fl\/et-t-v2h | - | |
| jtekt | pc10b_firmware | * | |
| jtekt | pc10b | - | |
| jtekt | pc10b-p_firmware | * | |
| jtekt | pc10b-p | - | |
| jtekt | nano_cpu_firmware | * | |
| jtekt | nano_cpu | - | |
| jtekt | pc10p_firmware | * | |
| jtekt | pc10p | - | |
| jtekt | pc10ge_firmware | * | |
| jtekt | pc10ge | - |
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"descriptions": [
{
"lang": "en",
"value": "When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P, and PC10GE receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop."
},
{
"lang": "es",
"value": "Cuando JTEKT Corporation TOYOPUC PLC versiones PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P y PC10GE reciben una trama no v\u00e1lida, el \u00e1rea exterior de un b\u00fafer de recepci\u00f3n para FL-net se sobrescribe. Como resultado, la CPU del PLC detecta un error del sistema y los productos afectados se detienen"
}
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"id": "CVE-2021-27477",
"lastModified": "2026-06-17T03:44:56.673",
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"version": "2.0"
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-07-01T13:15:08.003",
"references": [
{
"source": "ics-cert@hq.dhs.gov",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04"
}
],
"sourceIdentifier": "ics-cert@hq.dhs.gov",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "ics-cert@hq.dhs.gov",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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