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CVE-2025-7004

Avast antivirus heap buffer OOB write when scanning a malformed PE file

HIGH
7.8
CVSS Score
Published: June 12, 2026 at 10:04 PM UTC
Updated: October 7, 2026 at 08:10 AM UTC
5 products affected across 1 vendorNorton AntivirusAvast OneAvast Antivirus

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Heap buffer out-of-bounds write vulnerability in Avast Antivirus when scanning a malformed Windows PE file may allow Local Execution of Code or Denial-of-Service of the antivirus process. This issue 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. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Avast Antivirus· Gen Digital
60%
v < 25040308
Affected range stops below 25040308, so it looks safe — our inference, not a vendor statement
Avast Business Antivirus· Gen Digital
60%
v < 25040308
Affected range stops below 25040308, so it looks safe — our inference, not a vendor statement
Avast One· Gen Digital
60%
v < 25040308
Affected range stops below 25040308, so it looks safe — our inference, not a vendor statement
AVG Antivirus· Gen Digital
60%
v < 25040308
Affected range stops below 25040308, so it looks safe — our inference, not a vendor statement
Norton Antivirus· Gen Digital
60%
v < 25040308
Affected range stops below 25040308, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]
https://www.gendigital.com/us/en/contact-us/security-advisories/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHGEN
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-787

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