Critical · published December 1, 2025
🚨 An integer overflow in Avast Antivirus can turn your security software into a door wide open for privilege escalation! 🔥 Think of this flaw like a bouncer at a club who forgets to check the IDs of guests on the guest list — it lets unauthorized individuals waltz right in when they shouldn't belong. Just like a party that could get out of hand, this vulnerability could give attackers access they shouldn't have. An attacker could exploit this vulnerability to escalate their privileges, potentially gaining complete control over the system. This could lead to unauthorized access to sensitive files, installation of malicious software, and a compromised system that may be difficult to recover. It's an absolute nightmare for any security-conscious user!
Think of this flaw like a bouncer at a club who forgets to check the IDs of guests on the guest list — it lets unauthorized individuals waltz right in when they shouldn't belong. Just like a party that could get out of hand, this vulnerability could give attackers access they shouldn't have. This integer overflow vulnerability allows for privilege escalation in Avast Antivirus versions 25.1.981.6 prior to 25.3, leading to the possibility of unauthorized access and manipulation of system resources.
An attacker could exploit this vulnerability to escalate their privileges, potentially gaining complete control over the system. This could lead to unauthorized access to sensitive files, installation of malicious software, and a compromised system that may be difficult to recover. It's an absolute nightmare for any security-conscious user! Immediate action is crucial! Update your Avast Antivirus to version 25.3 or later to close this security loophole. Additionally, consider regularly reviewing and updating your security protocols to stay ahead of potential threats. You've got this! Follow these steps to secure your system and keep those pesky intruders at bay! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| avast/antivirus | ≥ 25.1.981.6, < 25.3 | 25.3 |