What is CVE-2021-21832?

CVE-2021-21832 is a critical-severity vulnerability in Disc-Soft Daemon Tools, classified under Integer Overflow to Buffer Overflow. CVSS score: 9.8/10. Published 2021-08-17.

How severe is CVE-2021-21832?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Integer overflow in Disc-Soft Daemon Tools

CVE-2021-21832

A memory corruption vulnerability exists in the ISO Parsing functionality of Disc Soft Ltd Deamon Tools Pro 8.3.0.0767. A specially crafted malformed file can lead to an out-of-bounds write. An attacker can provide a malicious file to trigger this vulnerability.

Published 2021-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (65.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Disc-Soft Daemon Tools — versions 8.3.0.0767
Disc — versions Disc Soft Ltd Deamon Tools Pro 8.3.0.0767

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2021-1295 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21832?: CVE-2021-21832 is a critical-severity vulnerability in Disc-Soft Daemon Tools, classified under Integer Overflow to Buffer Overflow. CVSS score: 9.8/10. Published 2021-08-17.
How severe is CVE-2021-21832?: Critical severity. CVSS v3 base score is 9.8 out of 10.