What’s Vulnerable › Vulnerabilities

CVE-2021-27204

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-12 · updated 2026-06-17
• Weakness: CWE-312

Description

Telegram before 7.4 (212543) Stable on macOS stores the local passcode in cleartext, leading to information disclosure.

Affected products

• Telegram: before 7.4.0 — fixed in 7.4.0

How to fix

Upgrade to a fixed version: Telegram 7.4.0. Check the vendor advisory for mitigations.

References

• https://www.inputzero.io/2020/12/telegram-privacy-fails-again.html
• https://www.youtube.com/watch?v=zEt-_5b4OaA
• https://www.inputzero.io/2020/12/telegram-privacy-fails-again.html
• https://www.youtube.com/watch?v=zEt-_5b4OaA

Get alerted when CVE-2021-27204 or the next vulnerability affects your stack