Cerber Lab
Practical Telegram security
Guides for urgent account problems, active-session checks and Cerber's own research.
Urgent
If account access is at risk
Start here if you suspect unauthorized access or messages sent in your name.
Urgent
Telegram account hacked: what to do now
Recover control of a compromised Telegram account: close unfamiliar sessions, handle the 24-hour restriction and use official recovery if you have lost access.
ReadUrgent
My Telegram account is sending spam: how to stop it
Stop unauthorized outgoing messages, check sessions and channel permissions, and distinguish a compromised Telegram account from impersonation.
ReadUrgent
Unknown device in Telegram sessions: what to check
Identify an unfamiliar Telegram session using the client, login time and activity; terminate confirmed unauthorized access and review the result.
ReadUrgent
Telegram will not terminate a session: the 24-hour restriction
Why Telegram blocks a fresh session from terminating other sessions, which login time matters and what you can do while the restriction applies.
ReadUnderstand sessions
How Telegram account access works
Understand the device list and the role of two-step verification.
Sessions
Telegram active sessions: find and read the device list
Find Telegram sessions on iOS, Android and Desktop, understand client and device fields, and choose between terminating one session and all other sessions.
ReadProtection
Telegram two-step verification: what it protects and what it does not
Enable Telegram's cloud password, secure its recovery email, and understand why two-step verification does not replace reviewing active sessions.
ReadCerber research
Our tests and observations
We distinguish documented platform behavior, prepared protocols and repeatable findings.
Cerber Lab
Start with a free account check
Review active sessions, two-step verification and connected access. The guides above help you interpret the result.