CVE-2026-3823

EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and execute arbitrary code.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.twcert.org.tw/en/cp-139-10753-e091e-2.html	Third Party Advisory
https://www.twcert.org.tw/tw/cp-132-10752-5a4d9-1.html	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:blackbeartechhive:atop_ehg2408_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:blackbeartechhive:atop_ehg2408:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:blackbeartechhive:atop_ehg2408-2sfp_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:blackbeartechhive:atop_ehg2408-2sfp:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-09 07:16

Updated : 2026-07-07 08:16

NVD link : CVE-2026-3823

Mitre link : CVE-2026-3823

CVE.ORG link : CVE-2026-3823

JSON object : View

Products Affected

blackbeartechhive

atop_ehg2408-2sfp_firmware
atop_ehg2408-2sfp
atop_ehg2408_firmware
atop_ehg2408

CWE

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

{"id": "CVE-2026-3823", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3823", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-03-09T20:52:39.289190Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "twcert@cert.org.tw", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "twcert@cert.org.tw", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "twcert@cert.org.tw", "affectedData": [{"vendor": "Atop Technologies", "product": "EHG2408", "versions": [{"status": "affected", "version": "0", "lessThan": "3.36", "versionType": "custom"}], "defaultStatus": "unaffected"}, {"vendor": "Atop Technologies", "product": "EHG2408-2SFP", "versions": [{"status": "affected", "version": "0", "lessThan": "3.36", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-03-09T07:16:04.420", "references": [{"url": "https://www.twcert.org.tw/en/cp-139-10753-e091e-2.html", "tags": ["Third Party Advisory"], "source": "twcert@cert.org.tw"}, {"url": "https://www.twcert.org.tw/tw/cp-132-10752-5a4d9-1.html", "tags": ["Third Party Advisory"], "source": "twcert@cert.org.tw"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "twcert@cert.org.tw", "description": [{"lang": "en", "value": "CWE-121"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and execute arbitrary code."}, {"lang": "es", "value": "El switch de la serie EHG2408 desarrollado por Atop Technologies tiene una vulnerabilidad de desbordamiento de b\u00fafer basado en pila, que permite a atacantes remotos no autenticados controlar el flujo de ejecuci\u00f3n del programa y ejecutar c\u00f3digo arbitrario."}], "lastModified": "2026-07-07T08:16:23.173", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:blackbeartechhive:atop_ehg2408_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FB256890-2AD0-46F0-A879-08128FDFCF48", "versionEndExcluding": "3.36"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:blackbeartechhive:atop_ehg2408:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "9C223C72-8175-4F32-9187-E8AC76BA7FF4"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:blackbeartechhive:atop_ehg2408-2sfp_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58E6FEFD-A296-44A3-96F7-8905F3F9CEA3", "versionEndExcluding": "3.36"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:blackbeartechhive:atop_ehg2408-2sfp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "4A3D99FF-BBEF-4673-B36E-5BF3C679592B"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "twcert@cert.org.tw"}