CVE-2021-41499: Buffer Overflow Vulnerability exists in ajaxsoundstudio.com n Pyo < 1.03 in the Server_debug function, which a

Q: How do I fix CVE-2021-41499?

pyo: upgrade to 1.03. Exact commands for each OS are on this page.

Q: Is CVE-2021-41499 being exploited?

CVE-2021-41499 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-41499 affect?

CVE-2021-41499 affects pyo. Severity is high (CVSS 7.5). 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.

Q: How urgent is CVE-2021-41499?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-41499 is a high-severity flaw (CVSS 7.5) affecting pyo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-120
Published	2021-12-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pyo project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-12-17 21:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

pyo project pyo UPGRADE

Affected: < 1.03

Fixed in: 1.03

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pyo || rpm -q pyo || pyo --version

2. UPGRADE to 1.03 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pyo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pyo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-41499?

pyo: upgrade to 1.03. Exact commands for each OS are on this page.

Is CVE-2021-41499 being exploited?

CVE-2021-41499 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-41499 affect?

CVE-2021-41499 affects pyo. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2021-41499?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-41498 HIGH 7.5 DOWNGRADE Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function

References

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