What’s Vulnerable › Vulnerabilities

CVE-2019-14354

• Severity: low (CVSS 2.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-10 · updated 2026-06-17
• Weakness: CWE-203

Description

On Ledger Nano S and Nano X devices, a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels, allowing a partial recovery of display contents. For example, a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words, the side channel is relevant only if the attacker has enough control over the device's USB connection to make power-consumption measurements at a time when secret data is displayed. The side channel is not relevant in other circumstances, such as a stolen device that is not currently displaying secret data.

Affected products

• Ledger Nano S Firmware: all versions
• Ledger Nano X Firmware: all versions

References

• https://ledger-donjon.github.io/oled-vuln/
• https://ledger-donjon.github.io/oled-vuln/

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