Critical (9.1) in bitdefender update server. EPSS 0.9% chance of exploitation in the next 30 days.
Insufficient validation in the Bitdefender Update Server and BEST Relay components of Bitdefender Endpoint Security Tools versions prior to 6.6.20.294 allows an unprivileged attacker to bypass the in-place mitigations and interact with hosts on the network. This issue affects: Bitdefender Update Server versions prior to 6.6.20.294.
Severity
CVSS 3.1
9.1 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)