{"id":"CVE-2018-11239","aliases":["EUVD-2018-3279","GHSA-gqmr-2cq4-rr3c"],"status":"published","title":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG...","description":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the \"burnOverflow\" issue.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00894,"percentile":0.59742,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2018-05-19T18:00:00Z","modified":"2026-06-17T01:35:33Z","products":[{"vendor":"hexagontoken","product":"hexagon"}],"references":[{"url":"https://peckshield.com/2018/05/18/burnOverflow/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-11239"},{"url":"https://github.com/advisories/GHSA-gqmr-2cq4-rr3c"}],"sources":{"cve":[{"id":"CVE-2018-11239","description":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the \"burnOverflow\" issue.","status":"published","published":"2018-05-19T18:00:00Z","modified":"2024-08-05T08:01:52.826Z","updated_at":"2026-11-02T14:35:09.570381Z"}],"euvd":[{"id":"EUVD-2018-3279","description":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the \"burnOverflow\" issue.","status":"published","published":"2018-05-19T18:00:00Z","modified":"2024-08-05T08:01:52Z","updated_at":"2026-11-03T02:39:56.043234Z"}],"ghsa":[{"id":"GHSA-gqmr-2cq4-rr3c","title":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG...","description":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the \"burnOverflow\" issue.","status":"published","published":"2022-05-14T03:16:18Z","modified":"2023-02-02T05:07:14Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:52:27.909118Z"}],"nvd":[{"id":"CVE-2018-11239","description":"An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the \"burnOverflow\" issue.","status":"published","published":"2018-05-19T18:29:00.227Z","modified":"2026-06-17T01:35:33.64Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:04:27.507872Z"}]}}