{"id":"CVE-2026-67862","published":"2026-08-04T22:17:16.597","lastModified":"2026-08-05T19:17:34.047","description":"open62541 1.5.5 contains a buffer-overflow in the high-level attribute reading logic in src/client/ua_client_highlevel.c. This allows a remote attacker to cause a denial of service.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-400"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_highlevel.c","tags":[]},{"url":"https://github.com/open62541/open62541/issues/8139","tags":[]},{"url":"https://github.com/open62541/open62541/issues/8139","tags":[]}],"exploitRefs":[{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_highlevel.c","tags":[]},{"url":"https://github.com/open62541/open62541/issues/8139","tags":[]},{"url":"https://github.com/open62541/open62541/issues/8139","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw is a buffer overflow in open62541 1.5.5's attribute reading logic, allowing remote attackers to cause a denial of service. This matters because it can lead to system crashes without proper mitigation.","exploitability":"Exploitation requires access to the network and knowledge of the target version. It is moderately easy given these preconditions.","blast_radius":"If exploited, this could result in widespread service disruptions for systems using open62541 1.5.5, impacting availability and reliability.","remediation":"Update to a patched version of open62541 or apply vendor-provided patches immediately.","tags":["dos","network","ics"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:55:58.758Z"}}