“The head of the FBI’s science and technology division has admitted what no other agency official has acknowledged before—the FBI sometimes exploits zero-day vulnerabilities to catch bad guys.
The admission came in a profile published Tuesday of Amy Hess, the FBI’s executive assistant director for science and technology who oversees the bureau’s Operational Technology Division. Besides touching on the use of zero-days—that is, attack code that exploits vulnerabilities that remain unpatched, and in most cases are unknown by the company or organization that designs the product—Tuesday’s Washington Post article also makes passing mention of another hot-button controversy: the FBI’s use of stingrays.”
Source: FBI admits it uses stingrays, zero-day exploits | Ars Technica