CVE-2026-18784

A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

CVSS v3 5.3 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 3.1 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/gff-cw/information/issues/11
https://github.com/open62541/open62541/issues/8139
https://vuldb.com/cve/CVE-2026-18784
https://vuldb.com/submit/857012
https://vuldb.com/vuln/385786
https://vuldb.com/vuln/385786/cti

Configurations

No configuration.

History

23 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Se encontró una vulnerabilidad en o6 open62541 hasta la versión 1.5.5. Este problema afecta a la función UA_Client_readNodeClassAttribute del archivo src/client/ua_client_highlevel.c. Realizar una manipulación resulta en un desbordamiento de búfer basado en montículo. Atacar localmente es un requisito. El exploit se ha hecho público y podría ser utilizado. El proyecto cerró el informe del problema, afirmando que esta no es la forma oficial de informar una vulnerabilidad de seguridad.

Information

Published : 2026-08-04 17:16

Updated : 2026-10-24 16:10

NVD link : CVE-2026-18784

Mitre link : CVE-2026-18784

CVE.ORG link : CVE-2026-18784

JSON object : View

Products Affected

No product.

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-122

Heap-based Buffer Overflow

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