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CVE-2021-3643

29
FAUCET Score

CVE-2021-3643 is a critical global-buffer-overflow vulnerability in the lsx_adpcm_init function of SoX 14.4.1, affecting the sound_exchange_project. This flaw allows an unauthenticated attacker to disclose sensitive information by providing a specially crafted malicious file. With a CVSS score of 9.1 (CRITICAL) and a FAUCET Risk Score of 90/100, it poses a significant risk due to its network-based attack vector and low attack complexity. Despite its high severity, there is currently no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion is minimal, with only one mention observed.

Impacted Technologies

VendorProductVersion(s)CPE
14.4.1CPE matchmatch criteria
cpe:2.3:a:sound_exchange_project:sound_exchange:14.4.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 59th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2021-3643Moderate

sox: buffer overflow read vulnerability

Aug 12, 2021

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory