Ctis

If you've used a 521-bit ECDSA key (ecdsa-sha2-nistp521) with any previous version of PuTTY, consider it compromised! Generate a new key pair, and remove the old public key from authorized_keys files.

Let us finally clarify the vulnerability of the desktop version of Telegram, which caused a stir on Z-Day.

The XZ Utils backdoor is a sophisticated supply chain attack that targeted the open-source data compression utility widely used in Linux and Unix-like systems.