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Prosper data breach puts 17 million people at risk of identity theft
Mark Anderson | | October 17, 2025

Euclid Security Newsletter

October 17, 2025 

Prosper data breach puts 17 million people at risk of identity theft

Hackers stole the personal information (including Social Security Numbers) of over 17.6 million people after breaching the systems of financial services company Prosper.

 

Security News

Identity Security: Your First and Last Line of Defense

Today's enterprise threats go way beyond your garden-variety phishing scams and malware. The modern security perimeter? It's all about identity management.

Mozilla commits to updating Firefox on Windows 10

There are still millions of Windows 10 systems in use around the world, causing security concerns for many. But not all software developers are turning their backs on Windows 10 - Mozilla included.

Hackers Steal Sensitive Data From Auction House Sotheby's

Sotheby's, the famed auction house, has disclosed a data breach that involved hackers stealing highly sensitive personal information from its systems. An investigation revealed that the attacker had taken files containing information such as name, SSN, and financial account data.

Researchers Uncover WatchGuard VPN Bug That Could Let Attackers Take Over Devices

Cybersecurity researchers have disclosed details of a recently patched critical security flaw in WatchGuard Fireware that could allow unauthenticated attackers to execute arbitrary code.

Everyone's adopting AI, few are managing the risk

More than half of organizations report implementing AI-specific tools, and many are training teams in machine learning skills. Yet, few feel prepared for the governance requirements that will come with new AI regulations.

Windows 11 October updates break localhost (127.0.0.1) HTTP/2 connections

Microsoft's October Windows 11 updates have broken the "localhost" functionality, making applications that connect back to 127.0.0.1 over HTTP/2 no longer function properly.

Cyberattackers Target Top Password Managers

Major password managers are being impersonated in a spate of recent phishing attacks, including LastPass, Bitwarden, and 1Password, and enterprise users should be on notice.

 

Important Updates & Patches

Microsoft October 2025 Security Updates

Microsoft's October 2025 Patch Tuesday includes security updates for 172 flaws, including six zero-day vulnerabilities. These updates also addresses eight "Critical" vulnerabilities, five of which are remote code execution vulnerabilities and three are elevation of privilege vulnerabilities.

 

Dan's Corner

Japan running dry: Ransomware attack leaves nation days away from Asahi beer shortage

Beer lovers will be sobbing into their pints at the news that a ransomware attack has brought Japan's largest brewer to its knees and left the country days away from running out of its most popular beverage.

 

An archive of Euclid Security Newsletters can be found on the support website.

Euclid Technology Solutions, LLC
540 Devall Drive, Suite 301
Auburn, AL 36832

P: 301-657-8089
E: support@euclidtechnology.com

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