← Vulnerability feed

Vulnerability record · CVE-2025-3500 · published 1 December 2025

CVE-2025-3500: Avast antivirus integer overflow vulnerability

Avast · Antivirus

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.

9.8 CVSS 3.1 Critical EPSS 0.46% · top 62.8% CWE-190 · Integer overflow
9.8CVSS 3.1 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
26 Sep 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.gendigital.com/us/en/contact-us/security-advisories/ Not Applicable

Track CVE-2025-3500 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-10867Avast antivirus exposure of resource to wrong sphere vulnerabilityAn issue was discovered in Avast Antivirus before 20. The aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe) allows atta…EPSS 2.2%9.8CVE-2017-8307Avast antivirus vulnerabilityIn Avast Antivirus before v17, using the LPC interface API exposed by the AvastSVC.exe Windows service, it is possible to launch predefined binaries,…EPSS 1.8%8.8CVE-2021-45335Avast antivirus incorrect default permissions vulnerabilitySandbox component in Avast Antivirus prior to 20.4 has an insecure permission which could be abused by local user to control the outcome of scans, an…EPSS 0.38%8.8CVE-2021-45336Avast antivirus vulnerabilityPrivilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4 allows a local sandboxed code to gain elevated privilege…EPSS 0.46%8.8CVE-2021-45337Avast antivirus vulnerabilityPrivilege escalation vulnerability in the Self-Defense driver of Avast Antivirus prior to 20.8 allows a local user with SYSTEM privileges to gain ele…EPSS 0.43%7.8CVE-2025-13032Avast antivirus toctou race condition vulnerabilityDouble fetch in sandbox kernel driver in Avast/AVG Antivirus <25.3  on windows allows local attacker to escalate privelages via pool overflow.EPSS 0.25%7.8CVE-2022-4294Avira security improper privilege management vulnerabilityNorton, Avira, Avast and AVG Antivirus for Windows may be susceptible to a Privilege Escalation vulnerability, which is a type of issue whereby an at…EPSS 0.19%7.8CVE-2021-45338Avast antivirus vulnerabilityMultiple privilege escalation vulnerabilities in Avast Antivirus prior to 20.4 allow a local user to gain elevated privileges by calling unnecessaril…EPSS 0.38%

Source: NIST National Vulnerability Database (record CVE-2025-3500), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.