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KrebsOnSecurity recently heard from a reader whose boss’s email account got phished and was used to trick one of the company’s customers into sending a large payment to scammers. An investigation into the attacker’s infrastructure points to a long-running Nigerian cybercrime ring that is actively targeting established companies in the transportation and aviation industries. Image: Shutterstock, Mr. Teerapon Tiuekhom. A reader who works in the transportation industry sent a tip about a recent successful phishing…

On Sunday, July 20, Microsoft Corp. issued an emergency security update for a vulnerability in SharePoint Server that is actively being exploited to compromise vulnerable organizations. The patch comes amid reports that malicious hackers have used the SharePoint flaw to breach U.S. federal and state agencies, universities, and energy companies. Image: Shutterstock, by Ascannio. In an advisory about the SharePoint security hole, a.k.a. CVE-2025-53770, Microsoft said it is aware of active attacks targeting on-premises SharePoint…

Authorities in the United Kingdom this week arrested four people aged 17 to 20 in connection with recent data theft and extortion attacks against the retailers Marks & Spencer and Harrods, and the British food retailer Co-op Group. The breaches have been linked to a prolific but loosely-affiliated cybercrime group dubbed “Scattered Spider,” whose other recent victims include multiple airlines. The U.K.’s National Crime Agency (NCA) declined verify the names of those arrested, saying only…

Microsoft today released updates to fix at least 137 security vulnerabilities in its Windows operating systems and supported software. None of the weaknesses addressed this month are known to be actively exploited, but 14 of the flaws earned Microsoft’s most-dire “critical” rating, meaning they could be exploited to seize control over vulnerable Windows PCs with little or no help from users. While not listed as critical, CVE-2025-49719 is a publicly disclosed information disclosure vulnerability, with…