CVE-2026-43855 - Vulnerability Details - OpenCVE

Description

A heap-based buffer overflow vulnerability could allow a remote authenticated attacker to achieve arbitrary code execution.

Published: 2026-10-20

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Advantech

ADAM-3600

unaffected

Version	Status	Constraints
`prior to version 2.8.5.0`	affected	—

No data.

No data.

No data available yet.

Remediation

Vendor Solution

Advantech has released a security update to address these vulnerabilities. Users and administrators of affected product versions are advised to update to the latest version immediately.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Attack Vector Network

Attack Complexity High

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00586.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.advantech.com/en/security-advisory
https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149

History

Tue, 20 Oct 2026 12:45:00 +0000

Type	Values Removed	Values Added
Description		A heap-based buffer overflow vulnerability could allow a remote authenticated attacker to achieve arbitrary code execution.
References		https://www.advantech.com/en/security-advisory https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149
Metrics		cvssV4_0 `{'score': 7.5, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: CSA

Published: 2026-10-20T09:14:17.583Z

Updated: 2026-10-20T09:14:17.583Z

Reserved: 2026-05-04T03:13:57.970Z

Link: CVE-2026-43855

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-10-20T10:17:06.520

Modified: 2026-10-20T10:17:06.520

Link: CVE-2026-43855

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43855", "assignerOrgId": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "state": "PUBLISHED", "assignerShortName": "CSA", "dateReserved": "2026-05-04T03:13:57.970Z", "datePublished": "2026-10-20T09:14:17.583Z", "dateUpdated": "2026-10-20T09:14:17.583Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "shortName": "CSA", "dateUpdated": "2026-10-20T09:14:17.583Z"}, "affected": [{"vendor": "Advantech", "product": "ADAM-3600", "versions": [{"status": "affected", "version": "prior to version 2.8.5.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A heap-based buffer overflow vulnerability could allow a remote authenticated attacker to achieve arbitrary code execution.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>A heap-based buffer overflow vulnerability could allow a remote authenticated attacker to achieve arbitrary code execution.</p>"}]}], "references": [{"url": "https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149"}, {"url": "https://www.advantech.com/en/security-advisory", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "Advantech has released a security update to address these vulnerabilities. Users and administrators of affected product versions are advised to update to the latest version immediately.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Advantech has released a security update to address these vulnerabilities. Users and administrators of affected product versions are advised to update to the latest version immediately."}]}], "credits": [{"lang": "en", "value": "Simone Bossi and Raffaele Bova at Nozomi Networks", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "ADAM-3600", "vendor": "Advantech", "versions": [{"status": "affected", "version": "prior to version 2.8.5.0"}]}], "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap-based buffer overflow vulnerability could allow a remote authenticated attacker to achieve arbitrary code execution."}], "id": "CVE-2026-43855", "lastModified": "2026-10-20T10:17:06.520", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "type": "Secondary"}]}, "published": "2026-10-20T10:17:06.520", "references": [{"source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "url": "https://www.advantech.com/en/security-advisory"}, {"source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "url": "https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149"}], "sourceIdentifier": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "vulnStatus": "Received"}