Privilege Escalation
CISA: High-severity Linux flaw now exploited by ransomware gangs
CISA confirmed on Thursday that a high-severity privilege escalation flaw in the Linux kernel is now being exploited in ransomware attacks. While the vulnerability (tracked as CVE-2024-1086) was disclosed on January 31, 2024, as a use-after-free weakness in the netfilter: nf_tables kernel component and was fixed via a commit submitted in January 2024, it was first introduced […]
CISA orders feds to patch VMware Tools flaw exploited by Chinese hackers
On Thursday, CISA warned U.S. government agencies to secure their systems against attacks exploiting a high-severity vulnerability in Broadcom’s VMware Aria Operations and VMware Tools software. Tracked as CVE-2025-41244 and patched one month ago, this vulnerability allows local attackers with non-administrative privileges to a virtual machine (VM) with VMware Tools and managed by Aria Operations with SDMP enabled […]
Chinese hackers exploiting VMware zero-day since October 2024
Broadcom has patched a high-severity privilege escalation vulnerability in its VMware Aria Operations and VMware Tools software, which has been exploited in zero-day attacks since October 2024. While the American technology giant didn’t tag this security bug (CVE-2025-41244) as exploited in the wild, it thanked NVISO threat researcher Maxime Thiebaut for reporting the bug in May. However, […]
CISA warns of critical Linux Sudo flaw exploited in attacks
Hackers are actively exploiting a critical vulnerability (CVE-2025-32463) in the sudo package that enables the execution of commands with root-level privileges on Linux operating systems. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added this vulnerability to its Known Exploited Vulnerabilities (KEV) catalog, describing it as “an inclusion of functionality from untrusted control sphere.” CISA has given federal […]
Crypto24 ransomware hits large orgs with custom EDR evasion tool
The Crypto24 ransomware group has been using custom utilities to evade security solutions on breached networks, exfiltrate data, and encrypt files. The threat group’s earliest activity was reported on GeekFeed forums in September 2024, though it never reached notable levels of notoriety. According to Trend Micro researchers tracking Crypto24’s operations, the hackers have hit several large organizations in the United […]
Over 29,000 Exchange servers unpatched against high-severity flaw
Over 29,000 Exchange servers exposed online remain unpatched against a high-severity vulnerability that can let attackers move laterally in Microsoft cloud environments, potentially leading to complete domain compromise. The security flaw (tracked as CVE-2025-53786) helps threat actors who gain administrative access to on-premises Exchange servers to escalate privileges within the organization’s connected cloud environment by […]
Microsoft warns of high-severity flaw in hybrid Exchange deployments
Microsoft has warned customers to mitigate a high-severity vulnerability in Exchange Server hybrid deployments that could allow attackers to escalate their privileges in Exchange Online cloud environments without leaving any traces. Exchange hybrid configurations connect on-premises Exchange servers to Exchange Online (part of Microsoft 365), allowing for seamless integration of email and calendar features between […]
ReVault flaws let hackers bypass Windows login on Dell laptops
ControlVault3 firmware vulnerabilities impacting over 100 Dell laptop models can allow attackers to bypass Windows login and install malware that persists across system reinstalls. Dell ControlVault is a hardware-based security solution that stores passwords, biometric data, and security codes within firmware on a dedicated daughterboard, known as the Unified Security Hub (USH). The five vulnerabilities, reported by […]
WordPress Motors theme flaw mass-exploited to hijack admin accounts
Hackers are exploiting a critical privilege escalation vulnerability in the WordPress theme “Motors” to hijack administrator accounts and gain complete control of a targeted site. The malicious activity was spotted by Wordfence, which had warned last month about the severity of the flaw, tracked under CVE-2025-4322, urging users to upgrade immediately. Motors, developed by StylemixThemes, […]
CISA warns of attackers exploiting Linux flaw with PoC exploit
CISA has warned U.S. federal agencies about attackers targeting a high-severity vulnerability in the Linux kernel’s OverlayFS subsystem that allows them to gain root privileges. This local privilege escalation security flaw (CVE-2023-0386) is caused by a Linux kernel improper ownership management weakness and was patched in January 2023 and publicly disclosed two months later. Multiple proof-of-concept (PoC) exploits […]