CVE-2025-3449

A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.br-automation.com/fileadmin/SA25P003-178b6a20.pdf

Configurations

No configuration.

History

08 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de Generación de Números o Identificadores Predecibles en el componente SDM de las versiones de B&R Automation Runtime anteriores a la 6.4 podría permitir a un atacante no autenticado basado en red tomar el control de sesiones ya establecidas.

Information

Published : 2025-10-07 19:15

Updated : 2026-10-08 22:10

NVD link : CVE-2025-3449

Mitre link : CVE-2025-3449

CVE.ORG link : CVE-2025-3449

JSON object : View

Products Affected

No product.

CWE

CWE-340

Generation of Predictable Numbers or Identifiers

{"id": "CVE-2025-3449", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-3449", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-07T18:48:12.497205Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cybersecurity@ch.abb.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.2, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 1.6}], "cvssMetricV40": [{"type": "Secondary", "source": "cybersecurity@ch.abb.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/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": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "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": "cybersecurity@ch.abb.com", "affectedData": [{"vendor": "B&R Industrial Automation GmbH", "product": "Automation Runtime", "versions": [{"status": "affected", "version": "6.0", "lessThan": "6.4", "versionType": "custom"}, {"status": "affected", "version": "4", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2025-10-07T19:15:36.620", "references": [{"url": "https://www.br-automation.com/fileadmin/SA25P003-178b6a20.pdf", "source": "cybersecurity@ch.abb.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "cybersecurity@ch.abb.com", "description": [{"lang": "en", "value": "CWE-340"}]}], "descriptions": [{"lang": "en", "value": "A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions."}, {"lang": "es", "value": "Una vulnerabilidad de Generaci\u00f3n de N\u00fameros o Identificadores Predecibles en el componente SDM de las versiones de B&R Automation Runtime anteriores a la 6.4 podr\u00eda permitir a un atacante no autenticado basado en red tomar el control de sesiones ya establecidas."}], "lastModified": "2026-10-08T22:10:00.563", "sourceIdentifier": "cybersecurity@ch.abb.com"}