The tools are said to have been created by the US National Security Agency (NSA), and accompanying documents appear to indicate a possible breach of the Swift global banking system.
Some of the tools appeared to target the SWIFT banking system, according to classified documents found in the cache.
"The reports of an alleged hacker-compromised EastNets Service Bureau network is totally false and unfounded", it said.
"Customers still running prior versions of these products are encouraged to upgrade to a supported offering", the company said.
"We have no evidence to suggest that there has ever been any unauthorised access to our network or messaging services". It operates as a messaging system for such things as letters of credit, payments and securities transactions between banks.
Swift was successfully targeted by hackers previous year when criminals stole $81m from the Bangladeshi central bank.
Yesterday, an elusive group of hackers, who go back by the name Shadow Brokers, released a massive dump of Windows exploits that were allegedly stolen from the NSA. Contained in the data they dumped online are vulnerabilities in Windows computers and servers in which a collection of 15 exploits contains at least four spy tools that could be used to hack Windows.
Last week, the Shadow Brokers protested Donald Trump's involvement in Syria when they released a password that unlocked a trove of NSA exploits. Swift service bureaus are companies that provide an access point to the Swift system for the network's smaller clients and may send or receive messages regarding money transfers on their behalf. "I have been able to hack pretty much every Windows version here in my lab using this leak".
When cyberthieves robbed the Bangladesh Bank a year ago, they compromised that bank's local SWIFT network to order money transfers from its account at the New York Federal Reserve. Security experts hope that as more information come out about the leaks, Microsoft will have already released fixes and patches.
Former CIA whistleblower Edward Snowden described the NSA's hack as the "Mother Of All Exploits", in reference to the massive U.S. bomb dropped last week on Afghanistan.
"Microsoft doesn't credit anyone for the report behind the March patch", tweeted former NSA contractor Edward Snowden.
Both TechCrunch and Wired said they had received no comment from either the NSA or Microsoft.
At the same time, experts have also stated that a number of the tools leaked by the Shadow Brokers were "irreplaceable" and their exposure significantly harmed the NSA's hacking capabilities.
"Maybe if all surviving WWIII, The Shadow Brokers be seeing you next week". This is according to a Microsoft blog post published late Friday night.
While Microsoft didn't explicitly accept that these three exploits affect unsupported versions, it did suggest Windows users to update their systems to the latest offerings.