What is CVE-2021-41499?

CVE-2021-41499 is a high-severity vulnerability in Pyo Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-12-17.

How severe is CVE-2021-41499?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-41499 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Pyo Project

CVE-2021-41499

Buffer Overflow Vulnerability exists in ajaxsoundstudio.com n Pyo < 1.03 in the Server_debug function, which allows remote attackers to conduct DoS attacks by deliberately passing on an overlong audio file name.

Vulnerability class: Buffer Overflow

Published 2021-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Pyo Project

Weakness classification (CWE)

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

Public proof-of-concept exploits

References

github.com/belangeo/pyo/issues/222 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-41499?: CVE-2021-41499 is a high-severity vulnerability in Pyo Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-12-17.
How severe is CVE-2021-41499?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-41499 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.