The exploits were reported by Wikileaks and detail how CIA agents could break into a Mac or iPhone if they had physical access to it. But after taking a look at the leaked documents, Apple told TechCrunch people shouldn't worry—those exploits are old and have been fixed years ago:
We have preliminarily assessed the Wikileaks disclosures from this morning. Based on our initial analysis, the alleged iPhone vulnerability affected iPhone 3G only and was fixed in 2009 when iPhone 3GS was released. Additionally, our preliminary assessment shows the alleged Mac vulnerabilities were previously fixed in all Macs launched after 2013. We have not negotiated with Wikileaks for any information.
We have given them instructions to submit any information they wish through our normal process under our standard terms. Thus far, we have not received any information from them that isn't in the public domain. We are tireless defenders of our users' security and privacy, but we do not condone theft or coordinate with those that threaten to harm our users.