CVE-2021-20716 (GCVE-0-2021-20716)
Vulnerability from cvelistv5 – Published: 2021-04-28 00:45 – Updated: 2024-08-03 17:53
VLAI
EPSS
VEX
Summary
Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 and prior, WLI3-TX1-G54 firmware Ver.2.53 and prior, WLI-T1-B11 firmware Ver.2.20 and prior, WLI-TX1-G54 firmware Ver.2.20 and prior, WVR-G54-NF firmware Ver.2.02 and prior, WZR-G108 firmware Ver.2.41 and prior, WZR-G54 firmware Ver.2.41 and prior, WZR-HP-G54 firmware Ver.2.41 and prior, WZR-RS-G54 firmware Ver.2.55 and prior, and WZR-RS-G54HP firmware Ver.2.55 and prior) allows a remote attacker to enable the debug option and to execute arbitrary code or OS commands, change the configuration, and cause a denial of service (DoS) condition.
Severity
9.8 (Critical)
CWE
- Hidden Functionality
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.buffalo.jp/news/detail/20210427-02.html | x_refsource_MISC |
| https://jvn.jp/en/vu/JVNVU90274525/index.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| BUFFALO INC. | Buffalo network devices |
Affected:
BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 ...[truncated*]
|
guessed |
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{
"lang": "en",
"value": "Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 and prior, WLI3-TX1-G54 firmware Ver.2.53 and prior, WLI-T1-B11 firmware Ver.2.20 and prior, WLI-TX1-G54 firmware Ver.2.20 and prior, WVR-G54-NF firmware Ver.2.02 and prior, WZR-G108 firmware Ver.2.41 and prior, WZR-G54 firmware Ver.2.41 and prior, WZR-HP-G54 firmware Ver.2.41 and prior, WZR-RS-G54 firmware Ver.2.55 and prior, and WZR-RS-G54HP firmware Ver.2.55 and prior) allows a remote attacker to enable the debug option and to execute arbitrary code or OS commands, change the configuration, and cause a denial of service (DoS) condition."
},
{
"lang": "es",
"value": "Una funcionalidad Hidden en m\u00faltiples dispositivos de red de Buffalo (firmware de BHR-4RV Ver.2.55 y anteriores, firmware de FS-G54 Ver.2.04 y anteriores, firmware de WBR2-B11 Ver.2.32 y anteriores, firmware de WBR2-G54 Ver.2 .32 y anteriores, firmware de WBR2-G54-KD Ver.2.32 y anteriores, firmware de WBR-B11 Ver.2.23 y anteriores, firmware de WBR-G54 Ver.2.23 y anteriores, firmware de WBR-G54L Ver.2.20 y anteriores, firmware de WHR2-A54G54 Ver.2 .25 y anteriores, firmware de WHR2-G54 Ver.2.23 y anteriores, firmware de WHR2-G54V Ver.2.55 y anteriores, firmware de WHR3-AG54 Ver.2.23 y anteriores, firmware de WHR-G54 Ver.2.16 y anteriores, firmware de WHR-G54-NF Ver.2 .10 y anteriores, firmware de WLA2-G54 Ver.2.24 y anteriores, firmware de WLA2-G54C Ver.2.24 y anteriores, firmware de WLA-B11 Ver.2.20 y anteriores, firmware de WLA-G54 Ver.2.20 y anteriores, firmware de WLA-G54C Ver.2.20 y anteriores, firmware de WLAH-A54G54 Ver.2 .54 y anteriores, firmware de WLAH-AM54G54 Ver.2.54 y anteriores, firmware de WLAH-G54 Ver.2.54 y anteriores, firmware de WLI2-TX1-AG54 Ver.2.53 y anteriores, firmware de WLI2-TX1-AMG54 Ver.2.53 y anteriores, firmware de WLI2-TX1-G54 Ver.2 .20 y anteriores, firmware de WLI3-TX1-AMG54 Ver.2.53 y anteriores, firmware de WLI3-TX1-G54 Ver.2.53 y anteriores, firmware de WLI-T1-B11 Ver.2.20 y anteriores, firmware de WLI-TX1-G54 Ver.2.20 y anteriores, firmware de WVR-G54-NF Ver.2 .02 y anteriores, firmware de WZR-G108 Ver.2.41 y anteriores, firmware de WZR-G54 Ver.2.41 y anteriores, firmware de WZR-HP-G54 Ver.2.41 y anteriores, firmware de WZR-RS-G54 Ver.2.55 y anteriores, y firmware de WZR-RS-G54HP Ver.2.55 y anteriores) permite a un atacante remoto habilitar la opci\u00f3n de depuraci\u00f3n y ejecutar c\u00f3digo arbitrario o comandos del Sistema Operativo, cambiar la configuraci\u00f3n, y causar una condici\u00f3n de denegaci\u00f3n de servicio (DoS)"
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],
"id": "CVE-2021-20716",
"lastModified": "2024-11-21T05:47:03.950",
"metrics": {
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"vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
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"exploitabilityScore": 10.0,
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"source": "nvd@nist.gov",
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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:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-04-28T01:15:17.107",
"references": [
{
"source": "vultures@jpcert.or.jp",
"tags": [
"Third Party Advisory"
],
"url": "https://jvn.jp/en/vu/JVNVU90274525/index.html"
},
{
"source": "vultures@jpcert.or.jp",
"tags": [
"Vendor Advisory"
],
"url": "https://www.buffalo.jp/news/detail/20210427-02.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://jvn.jp/en/vu/JVNVU90274525/index.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://www.buffalo.jp/news/detail/20210427-02.html"
}
],
"sourceIdentifier": "vultures@jpcert.or.jp",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T15:00:35+00:00",
"cve": "CVE-2021-20716",
"id": "CVE-2021-20716",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2021-20716",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-20716.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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