It's rare that vulnerabilities affecting industrial control systems that are targeted by hackers working on behalf of nation states are discovered before they are exploited.
But computer security researchers caution that advisories of this nature often lack key information, causing delays in addressing them.
We took the patched version and the unpatched version of the firmware and we looked at the code for what was actually patched and what was not," said Daniel dos Santos, head of security research at ForeScout.
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