{"id":"CVE-2026-67859","aliases":["DEBIAN-CVE-2026-67859","EUVD-2026-52994","GHSA-2v4p-65pc-4gv4","UBUNTU-CVE-2026-67859"],"status":"published","title":"Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of...","description":"Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Discovery/LDS handling.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0082,"percentile":0.57593,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2026-08-04T00:00:00Z","modified":"2026-10-17T13:00:39Z","affected":[{"source":"osv","ecosystem":"Debian:13","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.18-1"]},{"source":"osv","ecosystem":"Debian:14","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.18-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1build1","1.4.18-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.11.1-1build1"]}],"references":[{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_services_discovery.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/issues/8095","tags":["exploit","report"]},{"url":"https://github.com/open62541/open62541/blob/master/examples/discovery/server_lds.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/util/ua_util.c","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67859"},{"url":"https://github.com/advisories/GHSA-2v4p-65pc-4gv4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-67859","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-67859","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67859","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-67859","description":"Buffer 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