cvedb.io
CVE-2021-38544
MEDIUM · CVSS 5.9
EPSS exploitation probability: 0%
Published 2021-08-11T16:15:07.247 · Last modified 2026-06-17T04:02:20.120

Summary

Sony SRS-XB33 and SRS-XB43 devices through 2021-08-09 allow remote attackers to recover speech signals from an LED on the device, via a telescope and an electro-optical sensor, aka a "Glowworm" attack. The power indicator LED of the speakers is connected directly to the power line, as a result, the intensity of a device's power indicator LED is correlative to the power consumption. The sound played by the speakers affects their power consumption and as a result is also correlative to the light intensity of the LEDs. By analyzing measurements obtained from an electro-optical sensor directed at the power indicator LEDs of the speakers, we can recover the sound played by them.

Affected products

sony — srs-xb33_firmware

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.