{"id":"CVE-2020-14199","aliases":["EUVD-2020-6354","GHSA-w7fh-c4r8-v8g4"],"status":"published","title":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction,...","description":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00863,"percentile":0.58863,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2020-06-16T17:07:22Z","modified":"2026-06-17T02:54:22Z","products":[{"vendor":"satoshilabs","product":"trezor_model_t_firmware"},{"vendor":"satoshilabs","product":"trezor_one_firmware"}],"references":[{"url":"https://blog.trezor.io/details-of-firmware-updates-for-trezor-one-version-1-9-1-and-trezor-model-t-version-2-3-1-1eba8f60f2dd","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14199"},{"url":"https://github.com/advisories/GHSA-w7fh-c4r8-v8g4"}],"sources":{"cve":[{"id":"CVE-2020-14199","description":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.","status":"published","published":"2020-06-16T17:07:22Z","modified":"2024-08-04T12:39:36.137Z","updated_at":"2026-11-02T14:35:46.476719Z"}],"euvd":[{"id":"EUVD-2020-6354","description":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.","status":"published","published":"2020-06-16T17:07:22Z","modified":"2024-08-04T12:39:36Z","updated_at":"2026-11-03T03:07:35.099081Z"}],"ghsa":[{"id":"GHSA-w7fh-c4r8-v8g4","title":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction,...","description":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.","status":"published","published":"2022-05-24T17:20:38Z","modified":"2023-01-29T05:03:18Z","updated_at":"2026-11-02T14:45:17.6265Z"}],"nvd":[{"id":"CVE-2020-14199","description":"BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.","status":"published","published":"2020-06-16T18:15:17.137Z","modified":"2026-06-17T02:54:22.593Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:06:07.249892Z"}]}}