CVE-2025-7004: high-severity vulnerability in Gen Digital Avast Antivirus
Avast antivirus heap buffer OOB write when scanning a malformed PE file
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Gen Digital · Avast AntivirusGen Digital · Avast Business AntivirusGen Digital · Avast OneGen Digital · AVG AntivirusGen Digital · Norton AntivirusRelated CVEs — Gen Digital Avast Antivirus
In the same product, most dangerous first.
CVE-2025-10101HIGHAvast antivirus heap buffer OOB read when scanning a malformed Mach-O fileEPSS 0.2%CVE-2025-7011HIGHAvast antivirus heap OOB when scanning a malformed zip fileEPSS 0.1%CVE-2025-7009HIGHAvast antivirus heap buffer OOB read when scanning a malformed PE fileEPSS 0.1%CVE-2025-7008HIGHAvast antivirus heap buffer OOB read when scanning a malformed PE fileEPSS 0.1%CVE-2026-6064HIGHNorton, Avast, and AVG local privilege escalation via link following in Data ShredderEPSS 0.1%CVE-2025-7019MEDIUMAvast antivirus stack overflow when scanning a malformed Office Open XML fileEPSS 0.1%