{"id":"CVE-2025-3500","title":"Integer Overflow or Wraparound vulnerability in Avast Antivirus (25.1.981.6) on Windows allows Privilege Escalation.This issue affects Antivirus: from 25.1.981.6 before 25.3.","summary":"Integer Overflow or Wraparound vulnerability in Avast Antivirus (25.1.981.6) on Windows allows Privilege Escalation.This issue affects Antivirus: from 25.1.981.6 before 25.3.","severity":"critical","cvss":9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","cwe":["CWE-190"],"vendor":"avast","product":"antivirus","affected":["antivirus >= 25.1.981.6, < 25.3"],"patched":["antivirus 25.3"],"published":"2025-12-01","updated":"2026-09-26","sourceUpdated":"2026-09-26T00:10:00.127","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-3500","references":[{"url":"https://www.gendigital.com/us/en/contact-us/security-advisories/","label":"security@nortonlifelock.com"}],"tags":["nvd","exploit-available"],"epss":0.00459,"epssPercentile":0.37119,"exploits":{"github":1,"githubRepos":["https://github.com/chicken3962/CVE-2025-3500-Poc"],"checkedAt":"2026-09-26T00:23:14.516Z"},"exploitAvailable":true,"ingestedAt":"2026-09-26T00:22:39.983Z","slug":"CVE-2025-3500","body":"## Overview\n\nInteger Overflow or Wraparound vulnerability in Avast Antivirus (25.1.981.6) on Windows allows Privilege Escalation.This issue affects Antivirus: from 25.1.981.6 before 25.3.\n\n## Affected\n\n- `antivirus >= 25.1.981.6, < 25.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `antivirus 25.3`","depth":"abyssal","depthScore":62,"depthScoreParts":{"impact":49.5,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}