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CVE-2020-14199

MEDIUM
6.5
CVSS Score
Published: June 16, 2020 at 05:07 PM UTC
Updated: June 17, 2026 at 02:54 AM UTC
4 products affected across 1 vendorTrezor One FirmwareTrezor Model T FirmwareTrezor Model T

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Trezor Model T Firmware· Satoshilabs
95%
v < 2.3.1
Affected range stops below 2.3.1, so it looks safe — our inference, not a vendor statement
satoshilabs-trezor-model-t (same device)
Trezor One Firmware· Satoshilabs
95%
v < 1.9.1
Affected range stops below 1.9.1, so it looks safe — our inference, not a vendor statement
satoshilabs-trezor-one (same device)
Trezor Model T· Satoshilabsdevice
80%
All versions
Trezor One· Satoshilabsdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://blog.trezor.io/details-of-firmware-updates-for-trezor-one-version-1-9-1-and-trezor-model-t-version-2-3-1-1eba8f60f2dd

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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