# Open62541 vulnerabilities Source: https://junglewise.ai/threats/vendors/open62541 Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/open62541.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 13 vulnerabilities in Open62541: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-116014, was published on 24 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 2 - All time: 13 (0 critical, 0 exploited in the wild) ## About Open62541 Open-source implementation of the OPC UA protocol for industrial IoT communication. ## Latest Open62541 vulnerabilities - [CVE-2026-116014: open62541 integer overflow in UA_DataType_fromStructureDescription()](https://junglewise.ai/threats/cve-2026-116014-open62541-1-5-0-before-1-5-7-contains-an-integer-overflow-in-ua) (high, CVSS 8.1, published 24 Oct 2026) - [CVE-2026-82623: open62541 use-after-free in history backend](https://junglewise.ai/threats/cve-2026-82623-open62541-use-after-free-in-history-backend) (medium, CVSS 5.3, published 31 Aug 2026) - [CVE-2026-67862: open62541 heap-buffer-overflow in high-level attribute reading](https://junglewise.ai/threats/cve-2026-67862-open62541-heap-buffer-overflow-in-high-level-attribute-reading) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67861: open62541 stack overflow in UA_Client_getRemoteDataTypes](https://junglewise.ai/threats/cve-2026-67861-open62541-stack-overflow-in-ua-client-getremotedatatypes) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67860: open62541 heap buffer overflow in HistoryRead continuation point handling](https://junglewise.ai/threats/cve-2026-67860-open62541-heap-buffer-overflow-in-historyread-continuation-point) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67859: open62541 buffer overflow in Discovery/LDS handling](https://junglewise.ai/threats/cve-2026-67859-open62541-buffer-overflow-in-discovery-lds-handling) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67858: open62541 buffer overflow in Local Discovery Server multicast discovery](https://junglewise.ai/threats/cve-2026-67858-open62541-buffer-overflow-in-local-discovery-server-multicast) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67857: open62541 out-of-bounds read in responseReadNamespacesArray](https://junglewise.ai/threats/cve-2026-67857-open62541-out-of-bounds-read-in-responsereadnamespacesarray) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67856: open62541 denial of service via subscription requests](https://junglewise.ai/threats/cve-2026-67856-open62541-denial-of-service-via-subscription-requests) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67855: open62541 heap use-after-free in GDS PushManagement certificate update](https://junglewise.ai/threats/cve-2026-67855-open62541-heap-use-after-free-in-gds-pushmanagement-certificate) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-18785: open62541 client stack overflow in UA_Client_getRemoteDataTypes](https://junglewise.ai/threats/cve-2026-18785-open62541-client-stack-overflow-in-ua-client-getremotedatatypes) (medium, CVSS 5.3, published 4 Aug 2026) - [CVE-2026-18784: open62541 heap buffer overflow in UA_Client_readNodeClassAttribute](https://junglewise.ai/threats/cve-2026-18784-open62541-heap-buffer-overflow-in-ua-client) (medium, CVSS 5.3, published 4 Aug 2026) - [CVE-2026-15690: open62541 null pointer dereference in responseReadNamespacesArray](https://junglewise.ai/threats/cve-2026-15690-open62541-null-pointer-dereference-in-responsereadnamespacesarray) (low, CVSS 3.1, published 14 Jul 2026) ## Most severe Open62541 vulnerabilities - [CVE-2026-116014: open62541 integer overflow in UA_DataType_fromStructureDescription()](https://junglewise.ai/threats/cve-2026-116014-open62541-1-5-0-before-1-5-7-contains-an-integer-overflow-in-ua) (high, CVSS 8.1, published 24 Oct 2026) - [CVE-2026-67858: open62541 buffer overflow in Local Discovery Server multicast discovery](https://junglewise.ai/threats/cve-2026-67858-open62541-buffer-overflow-in-local-discovery-server-multicast) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67859: open62541 buffer overflow in Discovery/LDS handling](https://junglewise.ai/threats/cve-2026-67859-open62541-buffer-overflow-in-discovery-lds-handling) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67856: open62541 denial of service via subscription requests](https://junglewise.ai/threats/cve-2026-67856-open62541-denial-of-service-via-subscription-requests) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67861: open62541 stack overflow in UA_Client_getRemoteDataTypes](https://junglewise.ai/threats/cve-2026-67861-open62541-stack-overflow-in-ua-client-getremotedatatypes) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67857: open62541 out-of-bounds read in responseReadNamespacesArray](https://junglewise.ai/threats/cve-2026-67857-open62541-out-of-bounds-read-in-responsereadnamespacesarray) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67862: open62541 heap-buffer-overflow in high-level attribute reading](https://junglewise.ai/threats/cve-2026-67862-open62541-heap-buffer-overflow-in-high-level-attribute-reading) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67855: open62541 heap use-after-free in GDS PushManagement certificate update](https://junglewise.ai/threats/cve-2026-67855-open62541-heap-use-after-free-in-gds-pushmanagement-certificate) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-67860: open62541 heap buffer overflow in HistoryRead continuation point handling](https://junglewise.ai/threats/cve-2026-67860-open62541-heap-buffer-overflow-in-historyread-continuation-point) (high, CVSS 7.5, published 4 Aug 2026) - [CVE-2026-82623: open62541 use-after-free in history backend](https://junglewise.ai/threats/cve-2026-82623-open62541-use-after-free-in-history-backend) (medium, CVSS 5.3, published 31 Aug 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 1 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Open62541 vulnerabilities", https://junglewise.ai/threats/vendors/open62541, 9 November 2026.