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CVE-2026-67863

Quick assessment

Affected
n/a n/a
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open62541是Open62541团队开源的一个实现OPC UA通信协议的嵌入式Web服务器中间件。 Open62541 1.5.5版本存在安全漏洞，该漏洞源于本地MonitoredItem回调路径存在释放后重用问题，可能导致远程攻击者拒绝服务。

CVSS 7.5 · High EPSS 0.74% · P53

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a n/a n/a affected
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I. Basic Information for CVE-2026-67863

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path. The issue occurs when UA_Subscription_localPublish continues to use the current UA_Notification after a callback invokes UA_Server_deleteMonitoredItem for the current local MonitoredItem. This allows a remote attacker to cause a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Open62541 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open62541是Open62541团队开源的一个实现OPC UA通信协议的嵌入式Web服务器中间件。 Open62541 1.5.5版本存在安全漏洞，该漏洞源于本地MonitoredItem回调路径存在释放后重用问题，可能导致远程攻击者拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2026-67863

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 12623 chars
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III. Intelligence Information for CVE-2026-67863

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Other References for CVE-2026-67863 (1)

Same Patch Batch · n/a · 2026-08-05 · 14 CVEs total

CVE-2026-67869 7.5 HIGH Open62541 安全漏洞
CVE-2025-70962 Zosi C519M 安全漏洞
CVE-2026-67864 Open62541 安全漏洞
CVE-2026-67865 Systerel S2OPC OPC UA Toolkit 安全漏洞
CVE-2025-63823 Safetipin My Safetipin 安全漏洞
CVE-2025-63822 SirenGPS Android Application 安全漏洞
CVE-2026-67867 Systerel S2OPC OPC UA Toolkit 安全漏洞
CVE-2026-67866 Systerel S2OPC OPC UA Toolkit 安全漏洞
CVE-2026-67870 Open62541 安全漏洞
CVE-2026-67872 Systerel S2OPC OPC UA Toolkit 安全漏洞
CVE-2026-67871 Systerel S2OPC OPC UA Toolkit 安全漏洞
CVE-2026-67873 MZ Automation lib60870-C 安全漏洞
CVE-2026-52466 VuFind 安全漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2026-67863

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