EUVD-2026-68367
GHSA-w6p5-54jx-cmmh
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
Network-reachable unauthenticated crash with no confidentiality or integrity impact; scope unchanged as only the server process is affected.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
AnalysisAI
Use-after-free in open62541 up to version 1.5.5 allows remote unauthenticated attackers to crash the OPC UA server's History Backend by sending crafted requests targeting the UA_DataValue_backend_copyRange function in the in-memory history data plugin. The impact is availability loss only - no confidentiality or integrity compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The History Backend plugin must be compiled in and actively configured in the open62541 deployment - specifically, the in-memory historian (`ua_history_data_backend_memory`) must be enabled and attached to at least one OPC UA node with historical data support. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate-to-low for most environments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been independently confirmed at time of analysis - the project closed the issue report as a non-standard disclosure submission rather than issuing a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
View allVendor StatusVendor
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