o6 open62541 ca356b088ada7dee824d1b4acd07c1ff07ce242b client_types_custom.c UA_Client_getRemoteDataTypes use after free

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k2.39

Summaryinfo

A vulnerability has been found in o6 open62541 ca356b088ada7dee824d1b4acd07c1ff07ce242b and classified as critical. The affected element is the function UA_Client_getRemoteDataTypes of the file examples/custom_datatype/client_types_custom.c. The manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2026-18785. Local access is required to approach this attack. Moreover, an exploit is present. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

Detailsinfo

A vulnerability, which was classified as critical, has been found in o6 open62541 ca356b088ada7dee824d1b4acd07c1ff07ce242b. This issue affects the function UA_Client_getRemoteDataTypes of the file examples/custom_datatype/client_types_custom.c. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed by Chuan Wei (CarnegieMe) with SCU as 8131 as not defined issue. It is possible to read the advisory at github.com. The vendor was not involved in the public release. The identification of this vulnerability is CVE-2026-18785. The exploitation is known to be easy. Attacking locally is a requirement. Technical details as well as a public exploit are known.

A public exploit has been developed by Chuan Wei (CarnegieMe) in Python. The exploit is available at github.com. It is declared as proof-of-concept. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Author: Chuan Wei (CarnegieMe)
Programming Language: 🔒
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/04/2026 Advisory disclosed
08/04/2026 +0 days VulDB entry created
08/04/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 8131
Researcher: Chuan Wei (CarnegieMe)
Organization: SCU
Status: Not defined

CVE: CVE-2026-18785 (🔒)
GCVE (CVE): GCVE-0-2026-18785
GCVE (VulDB): GCVE-100-385787
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/04/2026 10:35
Updated: 08/04/2026 10:53
Changes: 08/04/2026 10:35 (57), 08/04/2026 10:53 (14)
Complete: 🔍
Submitter: VULL
Committer: SCU_1CP
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #857052: open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b) Uncontrolled Recursion (Stack Overflow) (by VULL)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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