CVE-2021-3554: Bitdefender Endpoint Security Tools

Critical severity, CVSS 10.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Improper Access Control vulnerability in the patchesUpdate API as implemented in Bitdefender Endpoint Security Tools for Linux as a relay role allows an attacker to manipulate the remote address used for pulling patches. This issue affects: Bitdefender Endpoint Security Tools for Linux versions prior to 6.6.27.390; versions prior to 7.1.2.33. Bitdefender Unified Endpoint versions prior to 6.2.21.160. Bitdefender GravityZone versions prior to 6.24.1-1.

Affected products

• Bitdefender Endpoint Security Tools: before 6.6.27.390 (fixed in 6.6.27.390); from 7.0.0.00, before 7.1.2.33 (fixed in 7.1.2.33)
• Bitdefender Gravityzone: before 6.24.1-1 (fixed in 6.24.1-1); version 6.24.1-1 only

Published 2021-11-24. Last modified 2026-06-17.