What is CVE-2021-26805?

CVE-2021-26805 is a medium-severity vulnerability in Tsmuxer Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2021-04-14.

How severe is CVE-2021-26805?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-26805 known to be exploited?

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

Buffer overflow in Tsmuxer Project

CVE-2021-26805

Buffer Overflow in tsMuxer 2.6.16 allows attackers to cause a Denial of Service (DoS) by running the application with a malicious WAV file.

Vulnerability class: Buffer Overflow

Published 2021-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.5% 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

Tsmuxer Project — versions 2.6.16

Weakness classification (CWE)

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

Public proof-of-concept exploits

MiniMangosteen/MiniMangosteen

References

github.com/justdan96/tsMuxer/issues/395 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-26805?: CVE-2021-26805 is a medium-severity vulnerability in Tsmuxer Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2021-04-14.
How severe is CVE-2021-26805?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-26805 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.