Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 3)
CVE-2025-9033

7.8HIGH

Key Information:

Vendor

Gen Digital

Status
Avira Antivirus
Vendor
CVE Published:
12 June 2026

What is CVE-2025-9033?

Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.

This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.70.76.

Affected Version(s)

Avira Antivirus Windows 0

References

https://www.gendigital.com/us/en/contact-us/security-advi...

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mike Zhang, an independent security researcher
.