KTM System e-BOK allows the session identifier to be set by the client prior to authentication. If a cookie with a valid name is set, its value remains unchanged after successful login. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session.
This issue was fixed in the patch published in June 2026.
Exploitability
AV:LAC:LAT:NPR:NUI:PVulnerable System
VC:LVI:LVA:NSubsequent System
SC:NSI:NSA:N4.8/CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NAuthentication