Read the docs
TI-2021-16148 Aliases CVE-2021-38549GHSA-2p24-ppfc-qr69

MIRACASE MHUB500 USB splitters through 2021-08-09, in certain specific use cases in which…

Priority LOW 29Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

MIRACASE MHUB500 USB splitters through 2021-08-09, in certain specific use cases in which the device supplies power to audio-output equipment, 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. We assume that the USB splitter supplies power to some speakers. The power indicator LED of the USB splitter is connected directly to the power line, as a result, the intensity of the USB splitter's power indicator LED is correlative to its power consumption. The sound played by the connected speakers affects the USB splitter's power consumption and as a result is also correlative to the light intensity of the LED. By analyzing measurements obtained from an electro-optical sensor directed at the power indicator LED of the USB splitter, we can recover the sound played by the connected speakers.

Why it matters now

EPSS 0.01293 70th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:benda:miracase_hmub500_firmware:*:*:*:*:*:*:*:*up to 2021-08-09VulnerableBenda
cpe:2.3:h:benda:miracase_hmub500:-:*:*:*:*:*:*:*not specified by NVDRunning onBenda
  • cpe:2.3:o:benda:miracase_hmub500_firmware:*:*:*:*:*:*:*:* Versions up to 2021-08-09 Vulnerable ·Benda
  • cpe:2.3:h:benda:miracase_hmub500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Benda

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-38549
  2. 2026-10-03 Alias added: GHSA-2p24-ppfc-qr69

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences