Out-of-bounds write in PowerISO
Priority LOW 36CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.00947 61st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | PowerISO | PowerISO 7.9 | — | No fix listed | CNA |
- PowerISO Vendor— Affected PowerISO 7.9 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-21871
- 2026-10-03 Alias added: GHSA-34wh-mx6f-wwpc
References
More Poweriso vulnerabilities
- TI-2022-20332 Out-of-bounds write in PowerISO CVSS 3.1HIGH 7.8
- TI-2017-02044 Use after free in PowerIso CVSS 3.1HIGH 7.8
- TI-2017-02038 Memory corruption in PowerISO CVSS 3.0HIGH 8.8
- TI-2006-02047 Directory traversal vulnerability in PowerISO 2.9 allows remote attackers to write… CVSS 2.0HIGH 7.8
Sources
- CVE-2021-21871 · CVE Program
- CVE-2021-21871 · NVD
- FIRST EPSS
- GHSA-34wh-mx6f-wwpc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences