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    CVE-2025-3500

    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.

    Published:Dec 1, 2025
    Last Modified:Feb 26, 2026
    EPS:Dec 1, 2025
    EPSS Score:0.00034
    CVSS Score:9

    Affected Products

    Vendor
    Avast
    Product
    Antivirus
    Vendor
    Microsoft
    Product
    Windows

    Exploits

    https://github.com/chicken3962/CVE-2025-3500-Poc

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

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    CVE-2025-13032 (CVSS 9.9) — Double fetch in sandbox kernel driver in Avast/AVG Antivirus <25.3  on windows allows local attacker to escala…
    CVE-2024-9484 (CVSS 5.1) — An null-pointer-derefrence in the engine module in AVG/Avast Antivirus signature <24092400 released on 24/Sep/…
    CVE-2024-9483 (CVSS 5.1) — A null-pointer-dereference in the signature verification module in AVG/Avast Antivirus signature <24092400 rel…
    CVE-2024-9482 (CVSS 5.1) — An out-of-bounds write in the engine module in AVG/Avast Antivirus signature <24092400 released on 24/Sep/2024…
    CVE-2024-9481 (CVSS 5.1) — An out-of-bounds write in the engine module in AVG/Avast Antivirus signature <24092400 released on 24/Sep/2024…
    CVE-2024-5102 (CVSS 7.3) — A sym-linked file accessed via the repair function in Avast Antivirus <24.2 on Windows may allow user to eleva…
    CVE-2020-20118 (CVSS 5.5) — Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of se…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High