CVE-2020-14199

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-347

Affected software

No affected versions have been published.

Timeline

Published
Jun 16, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-14199: Medium severity, CVSS 6.5 | Vulnix