What is CVE-2021-34185?

CVE-2021-34185 is a high-severity vulnerability in Mackron Miniaudio, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2021-06-25.

How severe is CVE-2021-34185?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Mackron Miniaudio

CVE-2021-34185

Miniaudio 0.10.35 has an integer-based buffer overflow caused by an out-of-bounds left shift in drwav_bytes_to_u32 in miniaudio.h

Vulnerability class: Buffer Overflow

Published 2021-06-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Mackron Miniaudio — versions 0.10.35

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/mackron/miniaudio/issues/320 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-34185?: CVE-2021-34185 is a high-severity vulnerability in Mackron Miniaudio, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2021-06-25.
How severe is CVE-2021-34185?: High severity. CVSS v3 base score is 7.8 out of 10.