Shadow AI: The Hidden Risk Lurking in Your Business Tools

The UK's National Cyber Security Centre (NCSC) has warned that employees using AI tools without their employer's approval, known as shadow AI, are exposing organisations to risks that security teams often cannot see. Citing Microsoft research showing 71% of UK employees had used unapproved AI tools, the NCSC said this behaviour is now widespread and likely to continue as staff adopt new AI services faster than businesses can review and approve them.

The agency said that when employees feed company or customer data into these tools, the risk of data breaches, loss of intellectual property and regulatory non-compliance increases. This often happens when existing security policies do not meet practical business needs, pushing staff to find their own solutions. The NCSC also flagged that AI agents themselves can contain serious vulnerabilities; if exploited, an attacker could gain the same access and privileges the agent holds, potentially using it as a stepping stone into other parts of the business's systems.

Rather than aiming to eliminate shadow AI entirely, the NCSC recommends businesses focus on reducing it, similar to how they manage broader shadow IT issues. It encourages building a positive security culture where employees feel comfortable raising concerns and discussing tool use openly, rather than hiding it.