Technology giants SAP, Symantec and McAfee allowed a Russian defense agency to probe the source code of some of their products — the same ones used by at least a dozen federal agencies — in order to sell in the Russian market, Reuters reports.

Why it matters: Experts say this could jeopardize the security of government computers and networks by allowing Russian hackers to discover unknown vulnerabilities. The agencies that use these software products include the Pentagon, NASA, the State Department, the FBI and other intelligence units.