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CVE-2021-38365

18
FAUCET Score

CVE-2021-38365 describes a "Glowworm" attack affecting Winner (ToneWinner) desktop speakers, allowing remote attackers to recover speech signals by observing the power-indicator LED. This low-severity vulnerability (CVSS 3.7) requires a specialized electro-optical sensor and telescope, making it a high-complexity attack with limited impact (confidentiality of speech). There is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2021-08-09CPE matchmatch criteria
cpe:2.3:o:tonewinner:winner_desktop_speakers_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.16%
Probability of exploitation in next 30 days
EPSS Percentile
63.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0115 is in the 43rd percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

tonewinner.com
Vendor Advisory
nassiben.com / glowworm-attack
ExploitThird Party Advisory