CVE-2021-4198: Bitdefender Antivirus Plus

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A NULL Pointer Dereference vulnerability in the messaging_ipc.dll component as used in Bitdefender Total Security, Internet Security, Antivirus Plus, Endpoint Security Tools, VPN Standalone allows an attacker to arbitrarily crash product processes and generate crashdump files. This issue affects: Bitdefender Total Security versions prior to 26.0.3.29. Bitdefender Internet Security versions prior to 26.0.3.29. Bitdefender Antivirus Plus versions prior to 26.0.3.29. Bitdefender Endpoint Security Tools versions prior to 7.2.2.92. Bitdefender VPN Standalone versions prior to 25.5.0.48.

Affected products

• Bitdefender Antivirus Plus: before 26.0.3.29 (fixed in 26.0.3.29)
• Bitdefender Endpoint Security Tools: before 7.2.2.92 (fixed in 7.2.2.92)
• Bitdefender Internet Security: before 26.0.3.29 (fixed in 26.0.3.29)
• Bitdefender Total Security: before 26.0.3.29 (fixed in 26.0.3.29)
• Bitdefender VPN Standalone: before 25.5.0.48 (fixed in 25.5.0.48)

Published 2022-03-07. Last modified 2026-06-17.