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CVE-2025-7004— Avast antivirus heap buffer OOB write when scanning a malformed PE file

Quick assessment

Affected
Gen Digital Avast Antivirus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gen Digital Avast Antivirus是美国Gen Digital公司的一个防病毒与网络安全软件。 Gen Digital Avast Antivirus存在缓冲区错误漏洞，该漏洞源于扫描畸形Windows PE文件时存在堆缓冲区越界写入，可能导致本地执行代码或导致杀毒进程拒绝服务。以下版本受到影响：Avast Antivirus、AVG Antivirus、Norton Antivirus、Avast One和Avast Business Antivirus在Windows、macOS和

CVSS 7.8 · High EPSS 0.15% · P3

Affected Version Matrix 5

VendorProduct Version RangeStatus
Gen Digital Avast Antivirus < 25040308 affected
Gen Digital Avast Business Antivirus < 25040308 affected
Gen Digital Avast One < 25040308 affected
Gen Digital AVG Antivirus < 25040308 affected
Gen Digital Norton Antivirus < 25040308 affected
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I. Basic Information for CVE-2025-7004

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Avast antivirus heap buffer OOB write when scanning a malformed PE file
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Gen Digital Avast Antivirus 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gen Digital Avast Antivirus是美国Gen Digital公司的一个防病毒与网络安全软件。 Gen Digital Avast Antivirus存在缓冲区错误漏洞，该漏洞源于扫描畸形Windows PE文件时存在堆缓冲区越界写入，可能导致本地执行代码或导致杀毒进程拒绝服务。以下版本受到影响：Avast Antivirus、AVG Antivirus、Norton Antivirus、Avast One和Avast Business Antivirus在Windows、macOS和
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gen Digital Avast Antivirus 0 ~ 25040308 -
Gen Digital AVG Antivirus 0 ~ 25040308 -
Gen Digital Norton Antivirus 0 ~ 25040308 -
Gen Digital Avast One 0 ~ 25040308 -
Gen Digital Avast Business Antivirus 0 ~ 25040308 -

II. Public POCs for CVE-2025-7004

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III. Intelligence Information for CVE-2025-7004

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Same Patch Batch · Gen Digital · 2026-06-12 · 17 CVEs total

CVE-2026-6676 7.8 HIGH Avira antivirus engine heap buffer OOB write when scanning a malformed POSIX tar archive
CVE-2025-7003 7.8 HIGH Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 1)
CVE-2025-7002 7.8 HIGH Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 2)
CVE-2025-7008 7.8 HIGH Avast antivirus heap buffer OOB read when scanning a malformed PE file
CVE-2025-7009 7.8 HIGH Avast antivirus heap buffer OOB read when scanning a malformed PE file
CVE-2025-7017 7.8 HIGH Avira antivirus engine heap buffer OOB read when scanning a malformed Windows MSI file
CVE-2025-7011 7.8 HIGH Avast antivirus heap OOB when scanning a malformed zip file
CVE-2025-9032 7.8 HIGH Avira antivirus engine heap buffer OOB read when scanning a malformed PE file
CVE-2025-9033 7.8 HIGH Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 3)
CVE-2025-14098 7.8 HIGH Avira antivirus engine heap buffer OOB write when scanning a malformed MS-DOS executable f
CVE-2026-12068 7.4 HIGH Avira Password Manager credential disclosure via cross-origin autofill in Firefox
CVE-2025-7006 5.5 MEDIUM Avast antivirus use of stack memory after free when scanning a malformed PE file
CVE-2025-7010 5.5 MEDIUM Avast antivirus stack overflow when scanning a malformed PDF file
CVE-2025-7005 5.5 MEDIUM Avast antivirus infinite recursion when scanning a malformed PE file
CVE-2025-7018 5.5 MEDIUM Avira antivirus engine null pointer dereference when scanning a malformed PE file
CVE-2025-7019 5.5 MEDIUM Avast antivirus stack overflow when scanning a malformed Office Open XML file

IV. Related Vulnerabilities

Same product: Avast Antivirus
Same vendor: Gen Digital
Same weakness: CWE-787

V. Comments for CVE-2025-7004

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