Almost half of CISOs have reported at least one deepfake incident in the past 12 months, highlighting the need to update incident response playbooks to address multimodal deepfake threats.

As the opening of the Gartner Security & Risk Management Summit in London on September 22, the global consulting firm published findings from its AI-driven Social Engineering Attacks report, which surveyed 297 senior cybersecurity leaders.

The survey, conducted between March and May 2026, found that AI is increasing the volume, personalization and credibility of social engineering while reducing the reliability of familiar detection cues.

More than four in ten respondents (41%) reported at least one social engineering incident involving a deepfake during an employee audio call in the previous 12 months and 36% reported one during a video call...