According to Kaspersky Lab, this vulnerability was exploited in the wild since March 2017 until October 2017. The attackers used the vulnerability to install cryptocurrency miners on victimsтАЩ computers.
Vulnerable component: Telegram Desktop for Windows
CVSSv3 score: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L/E:H/RL:O/RC:C
CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
The vulnerability allows a remote attacker to perform spoofing attack.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Note: this vulnerability has been exploited in the wild since March until October in 2017, according to Kaspersky Lab and was silently fixed by the vendor.