vmware esxi
CISA orders feds to patch actively exploited Dell flaw within 3 days
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) ordered government agencies to patch their systems within three days against a maximum-severity Dell vulnerability that has been under active exploitation since mid-2024. According to security researchers from Mandiant and the Google Threat Intelligence Group (GTIG), this hardcoded-credential vulnerability (CVE-2026-22769) in Dell’s RecoverPoint (a solution used for VMware virtual machine backup and […]
Chinese hackers exploiting Dell zero-day flaw since mid-2024
A suspected Chinese state-backed hacking group has been quietly exploiting a critical Dell security flaw in zero-day attacks that started in mid-2024. Security researchers from Mandiant and the Google Threat Intelligence Group (GTIG) revealed today that the UNC6201 group exploited a maximum-severity hardcoded-credential vulnerability (tracked as CVE-2026-22769) in Dell RecoverPoint for Virtual Machines, a solution used for VMware […]
CISA: VMware ESXi flaw now exploited in ransomware attacks
CISA confirmed on Wednesday that ransomware gangs have begun exploiting a high-severity VMware ESXi sandbox escape vulnerability that was used in zero-day attacks since at least February 2024. Broadcom patched this ESXi arbitrary-write vulnerability (tracked as CVE-2025-22225) almost one year ago, in March 2025, alongside a memory leak (CVE-2025-22226) and a TOCTOU flaw (CVE-2025-22224), and tagged them all […]
VMware ESXi zero-days likely exploited a year before disclosure
Chinese-speaking threat actors used a compromised SonicWall VPN appliance to deliver a VMware ESXi exploit toolkit that seems to have been developed more than a year before the targeted vulnerabilities became publicly known. In attacks from December 2025 analyzed by Huntress, managed security company, the hackers used a sophisticated virtual machine (VM) escape that likely exploited three VMware […]
Kraken ransomware benchmarks systems for optimal encryption choice
The Kraken ransomware, which targets Windows, Linux/VMware ESXi systems, is testing machines to check how fast it can encrypt data without overloading them. According to Cisco Talos researchers, Kraken’s feature is a rare capability that uses temporary files to choose between full and partial data encryption. The Kraken ransomware emerged at the begining of the […]
Scattered Spider is running a VMware ESXi hacking spree
Scattered Spider hackers have been aggressively targeting virtualized environments by attacking VMware ESXi hypervisors at U.S. companies in the retail, airline, transportation, and insurance sectors. According to the Google Threat Intelligence Group (GITG), the attackers keep employing their usual tactics that do not include vulnerability exploits but rely on perfectly executed social engineering “to bypass even […]
VMware fixes four ESXi zero-day bugs exploited at Pwn2Own Berlin
VMware fixed four vulnerabilities in VMware ESXi, Workstation, Fusion, and Tools that were exploited as zero-days during the Pwn2Own Berlin 2025 hacking contest in May 2025. Three of the patched flaws have a severity rating of 9.3, as they allow programs running in a guest virtual machine to execute commands on the host. These flaws […]
Trojanized RVTools push Bumblebee malware in SEO poisoning campaign
In response to our questions about the attack, Dell states that the malicious RVTools installer was not distributed from its sites but rather from fake typo-squatted domains. The company also states that the Dell-managed sites, Robware.net and RVTools.com, were taken offline as they are being targeted in DDoS attacks. “Dell Technologies operates two websites to distribute our RVTools […]
Hackers earn $1,078,750 for 28 zero-days at Pwn2Own Berlin
The Pwn2Own Berlin 2025 hacking competition has concluded, with security researchers earning $1,078,750 after exploiting 29 zero-day vulnerabilities and encountering some bug collisions. Throughout the contest, they targeted enterprise technologies in the AI, web browser, virtualization, local privilege escalation, servers, enterprise applications, cloud-native/container, and automotive categories. According to Pwn2Own’s rules, all targeted devices had all security […]
Hackers exploit VMware ESXi, Microsoft SharePoint zero-days at Pwn2Own
During the second day of Pwn2Own Berlin 2025, competitors earned $435,000 after exploiting zero-day bugs in multiple products, including Microsoft SharePoint, VMware ESXi, Oracle VirtualBox, Red Hat Enterprise Linux, and Mozilla Firefox. The highlight was a successful attempt from Nguyen Hoang Thach of STARLabs SG against the VMware ESXi, which earned him $150,000 for an […]