{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e2a781b38efb8686d2bd850c2f2372b5c670bc45"
            }
          ],
          "repo": "https://github.com/opcf-members/ua-.net-legacy",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.03.342"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "4011cb43d40b9b3259b25a223a9923da38ea7ea1"
            }
          ],
          "repo": "https://github.com/opcfoundation/ua-.net-legacy",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.03.352.10"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "33dab7e876e3f273d43ffa4c08552814fd7778d0"
            },
            {
              "fixed": "ebcf026a54dd0c9052cff009d96d827ac923d150"
            }
          ],
          "repo": "https://github.com/opcfoundation/ua-.netstandard",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in OPC UA .NET Standard Stack and Sample Code before GitHub commit 2018-04-12, and OPC UA .NET Legacy Stack and Sample Code before GitHub commit 2018-03-13. A vulnerability in OPC UA applications can allow a remote attacker to determine a Server's private key by sending carefully constructed bad UserIdentityTokens as part of an oracle attack.",
  "id": "CVE-2018-7559",
  "modified": "2026-03-14T13:51:25.901385831Z",
  "published": "2018-06-13T18:29:00.620Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/108688"
    },
    {
      "type": "ADVISORY",
      "url": "https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-7559.pdf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OPCFoundation/UA-.NET-Legacy/commit/e2a781b38efb8686d2bd850c2f2372b5c670bc45"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OPCFoundation/UA-.NETStandard/commit/ebcf026a54dd0c9052cff009d96d827ac923d150"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}