The reported threat involves a novel attack vector termed a 'Promptware Attack' targeting users of Gemini AI through Google Calendar invites. This attack leverages the integration of AI-driven prompt software (promptware) with calendar invite functionalities to hijack the user's Gemini AI instance. Although detailed technical specifics are limited, the attack likely exploits the way Gemini AI processes or responds to inputs originating from calendar invites, potentially injecting malicious prompts or commands. This could allow an attacker to manipulate the AI's behavior, extract sensitive information, or execute unauthorized actions on behalf of the user. The attack is categorized as a campaign, indicating a coordinated effort to exploit this vulnerability. The source of the information is a Reddit post linking to a HackRead article, with minimal discussion and no known exploits in the wild at the time of reporting. The severity is assessed as medium, reflecting the potential for misuse but limited current exploitation evidence. The attack vector via Google Calendar invites is notable because calendar invites are commonly trusted and often bypass traditional email security filters, making this a stealthy and innovative attack method. The lack of affected versions and patch information suggests this is an emerging threat requiring further investigation and monitoring.

For European organizations, this threat could have significant implications, especially for those relying on Gemini AI for business-critical functions integrated with Google Workspace. If exploited, attackers could manipulate AI outputs, leading to misinformation, unauthorized data access, or disruption of AI-assisted workflows. Confidentiality risks arise if sensitive data processed by Gemini AI is exposed or exfiltrated. Integrity could be compromised if AI-generated decisions or communications are altered maliciously. Availability might be affected if the AI service is hijacked or rendered unusable. Given the widespread adoption of Google Workspace across Europe and the increasing use of AI tools like Gemini AI, the attack could disrupt operations in sectors such as finance, healthcare, and government services. The stealthy nature of calendar invites as an attack vector may delay detection, increasing potential damage. However, the current lack of known exploits and minimal discussion suggests the immediate risk is moderate but warrants proactive attention.

European organizations should implement several targeted measures beyond generic advice: 1) Enhance monitoring and filtering of calendar invites, especially those containing unusual or unexpected content, by integrating security tools capable of analyzing invite metadata and content for anomalies. 2) Restrict or closely monitor integrations between AI tools like Gemini AI and calendar applications, applying strict access controls and permissions. 3) Educate users about the risks of accepting calendar invites from unknown or untrusted sources, emphasizing vigilance even within trusted domains. 4) Collaborate with AI and calendar software vendors to obtain updates or patches addressing this attack vector as they become available. 5) Employ anomaly detection systems to identify unusual AI behavior that may indicate hijacking attempts. 6) Conduct regular security assessments of AI workflows and their integration points with communication platforms to identify and remediate vulnerabilities. 7) Implement multi-factor authentication and session management policies to limit unauthorized access to AI services triggered via calendar invites.