{"id":"CVE-2021-33403","aliases":["EUVD-2021-20109","GHSA-c774-q263-4qv6"],"status":"published","title":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token,...","description":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01196,"percentile":0.68345,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2021-08-03T21:24:53Z","modified":"2026-06-17T03:54:32Z","products":[{"vendor":"blocklancertoken_project","product":"blocklancertoken"}],"references":[{"url":"https://cn.etherscan.com/address/0x63e634330a20150dbb61b15648bc73855d6ccf07#code","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://github.com/MRdoulestar/SC-RCVD/blob/main/Vulnerabilities/LNCToken.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33403"},{"url":"https://github.com/advisories/GHSA-c774-q263-4qv6"}],"sources":{"cve":[{"id":"CVE-2021-33403","description":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.","status":"published","published":"2021-08-03T21:24:53Z","modified":"2024-08-03T23:50:42.803Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20109","description":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.","status":"published","published":"2021-08-03T21:24:53Z","modified":"2024-08-03T23:50:42Z","updated_at":"2026-11-03T03:24:34.304953Z"}],"ghsa":[{"id":"GHSA-c774-q263-4qv6","title":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token,...","description":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.","status":"published","published":"2022-05-24T19:10:02Z","modified":"2023-01-30T05:01:15Z","cwes":["CWE-190"],"updated_at":"2026-11-02T14:46:22.009402Z"}],"nvd":[{"id":"CVE-2021-33403","description":"An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.","status":"published","published":"2021-08-03T22:15:09.17Z","modified":"2026-06-17T03:54:32.267Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/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":"2026-11-02T14:06:56.562207Z"}]}}