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A critical sandbox escape vulnerability has been disclosed in the popular vm2 Node.js library that, if successfully exploited, could allow attackers to run arbitrary code on the underlying operating system. The vulnerability, tracked as CVE-2026-22709 , carries a CVSS score of 9.8 out of 10.0 on the CVSS scoring system. "In vm2 for version 3.10.0, Promise.prototype.then Promise.prototype.catch callback sanitization can be bypassed," vm2 maintainer Patrik Simek said . "This allows attackers to escape the sandbox and run arbitrary code." vm2 is a Node.js library used to run untrusted code within a secure sandboxed environment by intercepting and proxying JavaScript objects to prevent sandboxed code from accessing the host environment. The newly discovered flaw stems from the library's improper sanitization of Promise handlers , which creates an escape vector that results in the execution of arbitrary code outside the sandbox boundaries. "The critical...

Threat actors with ties to China have been observed using an updated version of a backdoor called COOLCLIENT in cyber espionage attacks in 2025 to facilitate comprehensive data theft from infected endpoints. The activity has been attributed to Mustang Panda (aka Earth Preta, Fireant, HoneyMyte, Polaris, and Twill Typhoon) with the intrusions primarily directed against government entities located across campaigns across Myanmar, Mongolia, Malaysia, and Russia. Kaspersky, which disclosed details of the updated malware, said it's deployed as a secondary backdoor along with PlugX and LuminousMoth infections. "COOLCLIENT was typically delivered alongside encrypted loader files containing encrypted configuration data, shellcode, and in-memory next-stage DLL modules," the Russian cybersecurity company said . "These modules relied on DLL side-loading as their primary execution method, which required a legitimate signed executable to load a malicious DLL." Betwe...

When security teams discuss credential-related risk, the focus typically falls on threats such as phishing, malware, or ransomware. These attack methods continue to evolve and rightly command attention. However, one of the most persistent and underestimated risks to organizational security remains far more ordinary. Near-identical password reuse continues to slip past security controls, often unnoticed, even in environments with established password policies. Why password reuse still persists despite strong policies Most organizations understand that using the exact same password across multiple systems introduces risk. Security policies, regulatory frameworks, and user awareness training consistently discourage this behavior, and many employees make a genuine effort to comply. On the surface, this suggests that password reuse should be a diminishing problem. In reality, attackers continue to gain access through credentials that technically meet policy requirements. The reason ...

Google on Tuesday revealed that multiple threat actors, including nation-state adversaries and financially motivated groups, are exploiting a now-patched critical security flaw in RARLAB WinRAR to establish initial access and deploy a diverse array of payloads. "Discovered and patched in July 2025, government-backed threat actors linked to Russia and China as well as financially motivated threat actors continue to exploit this n-day across disparate operations," the Google Threat Intelligence Group (GTIG) said . "The consistent exploitation method, a path traversal flaw allowing files to be dropped into the Windows Startup folder for persistence, underscores a defensive gap in fundamental application security and user awareness." The vulnerability in question is CVE-2025-8088 (CVSS score: 8.8), which was patched by WinRAR version 7.13 released on July 30, 2025. Successful exploitation of the flaw could allow an attacker to obtain arbitrary code execution by c...

Cybersecurity researchers have discovered two malicious packages in the Python Package Index (PyPI) repository that masquerade as spellcheckers but contain functionality to deliver a remote access trojan (RAT). The packages, named spellcheckerpy and spellcheckpy , are no longer available on PyPI, but not before they were collectively downloaded a little over 1,000 times. "Hidden inside the Basque language dictionary file was a base64-encoded payload that downloads a full-featured Python RAT," Aikido researcher Charlie Eriksen said . "The attacker published three 'dormant' versions first, payload present, trigger absent, then flipped the switch with spellcheckpy v1.2.0, adding an obfuscated execution trigger that fires the moment you import SpellChecker." Unlike other packages that conceal the malicious functionality within "__init__.py" scripts, the threat actor behind the campaign has been found to add the payload inside a file named "re...