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Adobe: Hackers Are Exploiting Flash on Google Chrome, Microsoft Edge, Internet Explorer

A window on the Mozilla Firefox browser shows the browser has blocked the Adobe Flash plugin from activating. Sean Gallup—Getty Images

Adobe Systems warned on Monday that hackers are exploiting vulnerabilities in its Flash multimedia software platform in web browsers, and the company urged users to quickly patch their systems to prevent such attacks.

The warning came after cyber security firm Kaspersky Lab said a group it was tracking, BlackOasis, used the previously unknown weakness on Oct. 10 to plant malicious software on computers before connecting them back to servers in Switzerland, Bulgaria, and the Netherlands.

Kaspersky said the malware, known as FinSpy or FinFisher, is a commercial product typically sold to nation states and law enforcement agencies to conduct surveillance.

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Kaspersky said its assessment of BlackOasis shows it is targeting Middle Eastern politicians and United Nations officials engaged in the region, opposition bloggers and activists, and regional news correspondents with the latest version of FinSpy.

The company said victims have so far been observed in Russia, Iraq, Afghanistan, the United Kingdom, Iran and elsewhere in Africa and the Middle East.

Adobe adbe said it had released a Flash security update to fix the problem, which affected Google’s Chrome and Microsoft’s Edge msft and Internet Explorer browsers as well as desktop versions.

Adobe said in July that by the end of 2020 it would retire its once-ubiquitous technology used to power most of the media content found online.

It was heavily criticized by late Apple CEO Steve Jobs aapl , with alternatives such as HTML5 emerging in recent years and several web browsers now requiring users to enable Flash before running it.

On Google’s Chrome googl , the most popular web browser, Flash was used daily by 17% of desktop users, down from 80% in 2014, Google said at the time Adobe announced its retirement.

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