How severe is CVE-2021-21832?

CVE-2021-21832 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21832 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21832?

CVE-2021-21832 affects Disc-soft Daemon Tools. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21832?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-21832 published?

CVE-2021-21832 was published on 2021-08-17 and last updated on 2026-06-17.

CVE-2021-21832

CVE-2021-21832 is a critical-severity vulnerability in Disc-soft Daemon Tools with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Disc-soft Daemon Tools
Published: 2021-08-17
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-21832?: CVE-2021-21832 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21832 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21832?: CVE-2021-21832 affects Disc-soft Daemon Tools. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21832?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-21832 published?: CVE-2021-21832 was published on 2021-08-17 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1295

Affected products (1)

cpe:2.3:a:disc-soft:daemon_tools:8.3.0.0767:*:*:*:pro:*:*:*

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