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PatchSiren cyber security CVE debrief

CVE-2025-7009 Gen Digital CVE debrief

A heap buffer out-of-bounds read vulnerability exists in Avast Antivirus when scanning a malformed Windows PE file. This vulnerability, tracked as CVE-2025-7009, may allow for Local Execution of Code or Denial-of-Service of the antivirus process. The issue affects multiple products including Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25021310.

Vendor
Gen Digital
Product
Avast Antivirus
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Users of Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux who have not updated to virus definition build VPS 25021310 or later should be aware of this vulnerability.

Technical summary

The vulnerability is caused by a heap buffer out-of-bounds read when scanning a malformed Windows PE file. This could potentially allow an attacker to execute code locally or cause a Denial-of-Service condition on the affected antivirus process.

Defensive priority

High

Recommended defensive actions

  • Update virus definitions to build VPS 25021310 or later for Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux.
  • Ensure all installations are at or above the listed build to mitigate this vulnerability.

Evidence notes

The affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-7009 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-7009

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-7009 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-7009

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.