CVE-2026-6676
Received Received - Intake
Heap Buffer Overflow in Avira Antivirus Engine

Publication date: 2026-06-12

Last updated on: 2026-06-12

Assigner: NortonLifeLock Inc.

Description
Heap buffer out-of-bounds write vulnerability in Avira Antivirus engine when scanning a malformed POSIX tar archive 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 8.3.27.12.
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Meta Information
Published
2026-06-12
Last Modified
2026-06-12
Generated
2026-06-13
AI Q&A
2026-06-13
EPSS Evaluated
N/A
NVD
CVE-2026-6676
EUVD
EUVD-2026-36631
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
avira antivirus to 8.3.27.12 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is a heap buffer out-of-bounds write in the Avira Antivirus engine that occurs when scanning a malformed POSIX tar archive.

It may allow a local attacker to execute code or cause a denial-of-service (DoS) by crashing the antivirus engine process.

Impact Analysis

The vulnerability can impact you by allowing local attackers to execute arbitrary code on your system or cause the antivirus engine to crash, resulting in denial-of-service.

This could compromise the security of your system or disrupt antivirus protection.

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