On July 19–20, 2025, various security companies and national CERTs published alerts about active exploitation of on-premise SharePoint servers. According to the reports, observed attacks did not require authentication, allowed attackers to gain full control over the infected servers, and were performed using an exploit chain of two vulnerabilities: CVE-2025-49704Read More »ToolShell: a story of five vulnerabilities in Microsoft SharePoint

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 theRead More »Phishers Target Aviation Execs to Scam Customers

Mitel has released security updates to address a critical security flaw in MiVoice MX-ONE that could allow an attacker to bypass authentication protections. “An authentication bypass vulnerability has been identified in the Provisioning Manager component of Mitel MiVoice MX-ONE, which, if successfully exploited, could allow an unauthenticated attacker to conductRead More »Critical Mitel Flaw Lets Hackers Bypass Login, Gain Full Access to MiVoice MX-ONE Systems

Virtualization and networking infrastructure have been targeted by a threat actor codenamed Fire Ant as part of a prolonged cyber espionage campaign. The activity, observed this year, is primarily designed Now to infiltrate organizations’ VMware ESXi and vCenter environments as well as network appliances, Sygnia said in a new reportRead More »Fire Ant Exploits VMware Flaws to Compromise ESXi Hosts and vCenter Environments

Cybersecurity researchers have shed light on a new versatile malware loader called CastleLoader that has been put to use in campaigns distributing various information stealers and remote access trojans (RATs). The activity employs Cloudflare-themed ClickFix phishing attacks and fake GitHub repositories opened under the names of legitimate applications, Swiss cybersecurityRead More »CastleLoader Malware Infects 469 Devices Using Fake GitHub Repos and ClickFix Phishing

Sophos and SonicWall have alerted users of critical security flaws in Sophos Firewall and Secure Mobile Access (SMA) 100 Series appliances that could be exploited to achieve remote code execution.  The two vulnerabilities impacting Sophos Firewall are listed below – CVE-2025-6704 (CVSS score: 9.8) – An arbitrary file writing vulnerabilityRead More »Sophos and SonicWall Patch Critical RCE Flaws Affecting Firewalls and SMA 100 Devices