CVE-2021-38544: sony srs-xb33_firmware
Vulnerability summary
CVE-2021-38544 is a medium (CVSS 5.9) vulnerability in sony srs-xb33_firmware. EPSS estimates a 1.29% chance of exploitation in the next 30 days, higher than 70% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 11-08-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.29%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
0.00 pp
From 1.29% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (nassiben.com)
Maturity: unknown
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Sony2 products
- srs-xb33_firmware≤ 2021-08-09
- srs-xb43_firmware≤ 2021-08-09
1 vendor · 2 products