VMware vCenter

Ransomware Attack on SoftBank's IDCF Cloud Encrypts 3.6PB in 7 Minutes as Operations Team Misses Alerts for 7 Hours

SoftBank subsidiary IDC Frontier suffered a ransomware attack on its IDCF Cloud East Japan Region 1 that encrypted 3.6PB of primary storage across 239 hypervisors and 225 datastores in just seven minutes. Attackers also destroyed 554,153 snapshots, eliminating 41.5PB of backup capacity and leaving 495 enterprise and government customers without recoverable data from the provider. Operations staff spent the next seven hours repeatedly rebooting already-encrypted virtual machines and resetting console passwords while failing to locate any of the 225 RECOVER-INFO.txt ransom notes left in datastore root directories. The intrusion was only confirmed after the threat actors directly defaced the vCenter management console with the message “IDCF CLOUD INFRASTRUCTURE SEIZED”. The incident highlights critical gaps in asset inventory, log monitoring, and incident response procedures rather than any zero-day exploit. No ransom was paid; the provider instead focused on public updates while advising customers to rely on their own off-site backups.

CISA Adds Four Exploited Vulnerabilities to KEV Catalog Including Critical macOS Authentication Bypass

The US Cybersecurity and Infrastructure Security Agency has added four newly exploited vulnerabilities to its Known Exploited Vulnerabilities catalog. The flaws affect Apple macOS, Microsoft SharePoint, and VMware vCenter among other products. One of the vulnerabilities, tracked as CVE-2026-65400, allows network-based authentication bypass in macOS Screen Sharing without valid credentials. The issue received a CVSS v3.1 base score of 9.8 and is rated Critical. Apple addressed the flaw in macOS Tahoe 26.6.1, macOS Sequoia 15.7.9, and macOS Sonoma 14.8.9 released on August 6. Federal agencies have been instructed to apply mitigations within three days.

Attackers Exploit Critical CVE-2026-59310 in VMware vCenter for Persistent Remote Access

A critical vulnerability identified as CVE-2026-59310 in Broadcom VMware vCenter Server is being actively exploited in the wild against internet-exposed instances. The flaw resides in the Syslog server component and enables remote code execution through a path traversal weakness, carrying a CVSS score of 9.8. Attackers have been observed deploying malicious cron jobs and the reverse_ssh tool to establish persistent outbound command-and-control channels since early August 2026. The campaign has impacted 361 unique IP addresses across 47 countries, with notable concentrations in Germany, the United States, Turkey, Iran, and France. Broadcom has released patches under advisory VMSA-2026-0006.1, which also addresses the related CVE-2026-59309, and strongly recommends immediate updates along with network segmentation and log reviews. No workarounds exist, making prompt patching the only effective mitigation.

Broadcom Releases Critical Security Updates for VMware vCenter and ESX Vulnerabilities

Broadcom has issued security updates addressing five vulnerabilities in VMware vCenter and VMware ESX, including two rated as Critical. The flaws affect VMware Directory Service and Syslog server processing, potentially allowing authentication bypass and arbitrary code execution. CVE-2026-59309 enables attackers to bypass authentication over the network in VMware Directory Service, risking unauthorized system access. CVE-2026-59310 involves a path traversal issue in Syslog server handling that could lead to remote code execution. Multiple related products including VMware vSphere Foundation, VMware Cloud Foundation, VMware Telco Cloud Platform, and VMware Telco Cloud Infrastructure are also impacted. The advisory VMSA-2026-0006 was published on July 29, 2026, with patches now available.