FKIE_CVE-2023-39240
Vulnerability from fkie_nvd - Published: 2023-09-07 08:15 - Updated: 2026-06-17 06:11
Severity
Summary
It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.
References
| URL | Tags | ||
|---|---|---|---|
| twcert@cert.org.tw | https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.html | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.html | Third Party Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| asus | rt-ax55_firmware | 3.0.0.4.386_50460 | |
| asus | rt-ax55 | - | |
| asus | rt-ax56u_v2_firmware | 3.0.0.4.386_50460 | |
| asus | rt-ax56u_v2 | - | |
| asus | rt-ac86u_firmware | 3.0.0.4_386_51529 | |
| asus | rt-ac86u | - |
{
"affected": [
{
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"product": "RT-AX55",
"vendor": "ASUS",
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{
"status": "affected",
"version": "3.0.0.4.386_50460"
}
]
},
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"vendor": "ASUS",
"versions": [
{
"status": "affected",
"version": "3.0.0.4.386_50460"
}
]
}
],
"source": "twcert@cert.org.tw"
},
{
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],
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"version": "3.0.0.4.386.50460"
}
]
},
{
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],
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"product": "rt-ax55",
"vendor": "asus",
"versions": [
{
"status": "affected",
"version": "3.0.0.4.386_50460"
}
]
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "\nIt is identified a format string vulnerability in ASUS RT-AX56U V2\u2019s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.\n\n"
},
{
"lang": "es",
"value": "Se identific\u00f3 una vulnerabilidad de cadena de formato en la API de funci\u00f3n de cliente iperf de ASUS RT-AX56U V2. Esta vulnerabilidad se debe a la falta de validaci\u00f3n para un valor espec\u00edfico dentro de su m\u00f3dulo set_iperf3_cli.cgi. Un atacante remoto no autenticado puede aprovechar esta vulnerabilidad sin privilegios para realizar la ejecuci\u00f3n remota de c\u00f3digo arbitrario, el funcionamiento arbitrario del sistema o interrumpir el servicio."
}
],
"id": "CVE-2023-39240",
"lastModified": "2026-06-17T06:11:49.840",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.2,
"impactScore": 5.9,
"source": "twcert@cert.org.tw",
"type": "Secondary"
}
],
"ssvcV203": [
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"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-09-26T19:18:03.026290Z",
"version": "2.0.3"
}
}
]
},
"published": "2023-09-07T08:15:07.710",
"references": [
{
"source": "twcert@cert.org.tw",
"tags": [
"Third Party Advisory"
],
"url": "https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.html"
},
{
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],
"sourceIdentifier": "twcert@cert.org.tw",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-134"
}
],
"source": "twcert@cert.org.tw",
"type": "Secondary"
}
]
}
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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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