A Homoglyph Attack is a cybersecurity threat where attackers use visually similar characters (homoglyphs) from different alphabets to create deceptive website addresses or usernames. For example, they might replace the Latin letter 'a' with the Cyrillic 'а', which looks almost identical. This trick can fool users into visiting malicious websites or disclosing sensitive information, as the fake addresses appear legitimate at first glance. Homoglyph attacks exploit the subtle differences between characters to bypass user vigilance and traditional security checks.