What’s Vulnerable › Vulnerabilities

CVE-2018-20823

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-25 · updated 2026-06-17
• Weakness: CWE-20

Description

The gyroscope on Xiaomi Mi 5s devices allows attackers to cause a denial of service (resonance and false data) via a 20.4 kHz audio signal, aka a MEMS ultrasound attack.

Affected products

• Mi 5S Firmware: all versions

References

• https://hackaday.com/2018/07/17/freak-out-your-smartphone-with-ultrasound/
• https://medium.com/%40juliodellaflora/ultrassom-pode-causar-anomalias-no-girosc%C3%B3pio-do-xiaomi-mi5s-plus-4050d718bc7f
• https://hackaday.com/2018/07/17/freak-out-your-smartphone-with-ultrasound/
• https://medium.com/%40juliodellaflora/ultrassom-pode-causar-anomalias-no-girosc%C3%B3pio-do-xiaomi-mi5s-plus-4050d718bc7f

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