Threat update

Researchers have demonstrated a new attack technique called TrustSink that abuses the multi-factor authentication (MFA) features in Microsoft Entra ID, the identity service behind Microsoft 365. An attacker who gains control of a high-level admin account can quietly add a fake MFA provider to the tenant. From then on, every time a user signs in, that fake provider captures their password in plain text while the login completes normally. Organizations that use Microsoft 365 should review their Entra ID authentication settings and lock down admin accounts now.

Threat update

A newly detailed Linux kernel vulnerability, tracked as CVE-2026-43502 and nicknamed ZcopyReaper, allows an unprivileged local user to escalate to full root control by abusing a memory-handling error in the kernel's Reliable Datagram Sockets (RDS) component. The flaw has existed since Linux kernel 4.17, working exploit code has been published, and patched kernels are available from major distributions. Organizations running Linux servers, cloud workloads, or Linux-based appliances should confirm patch status now. 

Threat update

A newly documented malware family named KATARU is hijacking internet-facing Linux devices, including routers and other IoT equipment, by guessing weak or default Telnet passwords. Once inside, it takes root-level control, embeds itself so it survives reboots, and enlists the device in a Mirai-style botnet used for large-scale DDoS attacks. Any organization with connected devices that are exposed to the internet, unpatched, or protected by default credentials should review its exposure now.