{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-9758: Improper Certificate Validation in S2OPC","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-9758","status":"final","version":"1","initial_release_date":"2026-06-10T12:32:39.183Z","current_release_date":"2026-06-10T13:54:59.235Z","revision_history":[{"date":"2026-06-10T12:32:39.183Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-9758 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-9758"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-9758"},{"category":"external","summary":"gitlab.com","url":"https://gitlab.com/systerel/S2OPC/-/work_items/1770"}]},"product_tree":{"branches":[{"category":"vendor","name":"Systerel","branches":[{"category":"product_name","name":"S2OPC","branches":[{"category":"product_version_range","name":">=1.5.0 <1.7.3","product":{"name":"Systerel S2OPC >=1.5.0 <1.7.3","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:systerel:s2opc:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-9758","title":"Improper Certificate Validation in S2OPC","notes":[{"category":"description","text":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","baseScore":7.3,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 1.7.3.","product_ids":["CSAFPID-1"]}]}]}