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PatchSiren cyber security CVE debrief

CVE-2025-7004 Gen Digital CVE debrief

A heap buffer out-of-bounds write vulnerability exists in Avast Antivirus when scanning a malformed Windows PE file. This issue may allow for Local Execution of Code or Denial-of-Service of the antivirus process. The vulnerability affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25040308.

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

Technical summary

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. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream.

Defensive priority

HIGH

Recommended defensive actions

  • Update virus definition builds to VPS 25040308 or later
  • Ensure installations are at or above the listed build to mitigate vulnerability

Evidence notes

The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-7004 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-7004

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

  • CVE-2025-7004 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-7004

    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.