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A critical token validation failure in Microsoft Entra ID (previously Azure Active Directory) could have allowed attackers to impersonate any user, including Global Administrators, across any tenant. The vulnerability, tracked as CVE-2025-55241 , has been assigned the maximum CVSS score of 10.0. It has been described by Microsoft as a privilege escalation flaw in Azure Entra. There is no indication that the issue was exploited in the wild. It has been addressed by the Windows maker as of July 17, 2025, requiring no customer action. The CVE was formally issued on September 4. Security researcher Dirk-jan Mollema, who discovered and reported the shortcoming on July 14, said the shortcoming made it possible to compromise every Entra ID tenant in the world, with the likely exception of national cloud deployments . The problem stems from a combination of two components: the use of service-to-service (S2S) actor tokens issued by the Access Control Service (ACS) and a fatal flaw in th...

An ongoing threat campaign dubbed VEILDrive has been observed taking advantage of legitimate services from Microsoft, including Teams, SharePoint, Quick Assist, and OneDrive, as part of its modus operandi. "Leveraging Microsoft SaaS services — including Teams, SharePoint, Quick Assist, and OneDrive — the attacker exploited the trusted infrastructures of previously compromised organizations to distribute spear-phishing attacks and store malware," Israeli cybersecurity company Hunters said in a new report. "This cloud-centric strategy allowed the threat actor to avoid detection by conventional monitoring systems." Hunters said it discovered the campaign in September 2024 after it responded to a cyber incident targeting a critical infrastructure organization in the United States. It did not disclose the name of the company, instead giving it the designation "Org C." The activity is believed to have commenced a month prior, with the attack culminating i...

Cybersecurity researchers are calling attention to a new phishing campaign that employs the ClickFix technique to deliver an open-source command-and-control (C2) framework called Havoc . "The threat actor hides each malware stage behind a SharePoint site and uses a modified version of Havoc Demon in conjunction with the Microsoft Graph API to obscure C2 communications within trusted, well-known services," Fortinet FortiGuard Labs said in a technical report shared with The Hacker News. The starting point of the attack is a phishing email containing an HTML attachment ("Documents.html") that, when opened, displays an error message, which uses the ClickFix technique to trick users into copying and executing a malicious PowerShell command into their terminal or PowerShell, thereby triggering the next-stage. The ClickFix bait used in the newly discovered campaign informs the user that there is an error connecting to Microsoft OneDrive, and that they need to rectif...

Even in well-secured environments, attackers are getting in—not with flashy exploits, but by quietly taking advantage of weak settings, outdated encryption, and trusted tools left unprotected. These attacks don't depend on zero-days. They work by staying unnoticed—slipping through the cracks in what we monitor and what we assume is safe. What once looked suspicious now blends in, thanks to modular techniques and automation that copy normal behavior. The real concern? Control isn't just being challenged—it's being quietly taken. This week's updates highlight how default settings, blurred trust boundaries, and exposed infrastructure are turning everyday systems into entry points. ⚡ Threat of the Week Critical SharePoint Zero-Day Actively Exploited (Patch Released Today) — Microsoft has released fixes to address two security flaws in SharePoint Server that have come under active exploitation in the wild to breach dozens of organizations across the world. Details of exploitation emer...