Critical Telegram Zero-Day Vulnerability Exposes User Accounts to Remote Hijacking

Critical Telegram Zero-Day Vulnerability Exposes User Accounts to Remote Hijacking

First seen 28 Mar 2026, 08:44 UTC MexcWww1.RuMezhaCybernewsSecurityaffairs.Co+3 82% similarity 76.5

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A critical zero-day vulnerability in Telegram, discovered by researcher Michael DePlante, allows attackers to remotely hijack user accounts without any user interaction. The flaw has been assigned a CVSS score of 9.8, indicating its high risk level. It affects the confidentiality, integrity, and availability of user data and is categorized as easily exploitable over a network. Telegram has up to 120 days to release a patch, but experts anticipate an earlier response due to the severity of the issue. Users are advised to monitor for updates and implement security measures such as strong passwords and two-factor authentication. The vulnerability is identified as ZDI-CAN-30207, and no public technical details are available yet. This situation highlights the necessity for users to keep their software updated and remain vigilant against potential threats.

Key Points: • A zero-day vulnerability in Telegram allows remote account hijacking without user action. • The flaw has a CVSS score of 9.8, indicating a critical level of risk. • Users are urged to update their Telegram app as soon as patches are released.

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Timeline

2026-03-27
Article published detailing the Telegram vulnerability.
2026-03-28
Further coverage released emphasizing the critical nature of the flaw.

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