Tollgrade LightHouse SMS before 5.1 patch 3 provides different error messages for failed authentication attempts depending on whether the username exists, which allows remote attackers to enumerate account names via a series of attempts.
Severity
CVSS 3.0
5.3 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)