Avast antivirus stack overflow when scanning a malformed Office Open XML file

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Summary

CVECVE-2025-7019
StatePUBLISHED
AssignerGEN
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-12 22:16:49 UTC
Updated2026-06-12 22:16:49 UTC
DescriptionStack overflow vulnerability in Avast Antivirus when scanning a malformed Office Open XML file may allow 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 25020100. 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-121 | CWE-121 CWE-121 Stack-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNACVSS5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gen Digital Avast Antivirus affected 25020100 custom Windows, macOS, Linux
CNA Gen Digital AVG Antivirus affected 25020100 custom Windows, macOS, Linux
CNA Gen Digital Norton Antivirus affected 25020100 custom Windows, macOS, Linux
CNA Gen Digital Avast One affected 25020100 custom Windows, macOS, Linux
CNA Gen Digital Avast Business Antivirus affected 25020100 custom Windows, macOS, Linux

References

ReferenceSourceLinkTags
www.gendigital.com/us/en/contact-us/security-advisories [email protected] www.gendigital.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Mike Zhang, an independent security researcher (en)

Additional Advisory Data

Solutions

CNA: Install virus definitions VPS 25020100 or any later virus-definition update. All builds at or above VPS 25020100 include the fix; staying current on definitions is required.

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