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Vulnerability record · CVE-2021-21871 · published 29 June 2021

CVE-2021-21871: Poweriso out-of-bounds write vulnerability

Poweriso · Poweriso

A memory corruption vulnerability exists in the DMG File Format Handler functionality of PowerISO 7.9. A specially crafted DMG file can lead to an out-of-bounds write. An attacker can provide a malicious file to trigger this vulnerability. The vendor fixed it in a bug-release of the current version.

7.8 CVSS 3.1 High EPSS 0.95% · top 40.4% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 6.8
0.95%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A memory corruption vulnerability exists in the DMG File Format Handler functionality of PowerISO 7.9. A specially crafted DMG file can lead to an out-of-bounds write. An attacker can provide a malicious file to trigger this vulnerability. The vendor fixed it in a bug-release of the current version.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1308 ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1308 ExploitThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-21871), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.