Colorado Supreme Court has held that attorneys do not owe any duties to non-clients

The Colorado Supreme Court held attorneys owe no duties to non-clients, such as the beneficiaries of a will, absent allegations of fraud, a malicious or tortious act, like negligent misrepresentation.

You can read more about the decision here and here.

The ruling goes against the view expressed in the Restatement of the Law Governing Lawyers (Sec 51), followed in several states, which recognizes duties to third parties (non-clients) in several circumstances.