CyberGlossary

Attacks & Threats

Piggybacking

Also known as: Access piggybacking

Definition

Unauthorized physical or logical access gained when an authorized person knowingly allows an attacker to follow them past an access control.

Piggybacking is a social-engineering technique in which an attacker obtains entry to a restricted area, network, or session because an authorized user grants them access — often out of politeness, a manufactured pretext, or coercion. Unlike tailgating, piggybacking involves the legitimate user's awareness or implicit cooperation, such as holding a door open for someone carrying boxes or sharing a Wi-Fi password. The attacker leverages trust and social norms rather than defeating the access control itself. Defences include mantraps, badge anti-passback rules, security awareness training, visitor escort policies, and clear procedures requiring everyone to badge in individually.

Examples

  • An attacker dressed as a delivery worker is let into a secure office by an employee holding the door open.
  • A guest connects to a corporate Wi-Fi network after an employee shares the password without authorization.

Related terms