Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Malware Newsletter Kimsuky Integrates AI into Attack Operations, From AI-Generated Decoy Documents to a Local LLM ShieldBreak – August 2026 disclosure Kimwolf v7: An Evolution of the Kimwolf Botnet CISA, FBI and Partners Warn Organizations of […]

A new multi-stage Rust-based macOS information stealer, dubbed AmnesiaStealer, has been identified as capable of hijacking Chromium-based browsers to give attackers live control over victims' sessions. This malware is part of a broader trend of evolving cyber threats, which includes the Kimsuky APT group integrating artificial intelligence into its attack operations, from generating decoy documents to deploying a local large language model (LLM) for defense evasion, branded as ShieldBreak.
Other notable developments in the threat landscape include the HoneyMyte APT group upgrading its CoolClient backdoor with a kernel-level Windows rootkit. Additionally, the Kimwolf botnet has evolved to version 7, which now hides its distributed denial-of-service (DDoS) traffic behind Chrome fingerprints and Ethereum transactions.
The cybersecurity community is also observing an increase in the exploitation of recently disclosed vulnerabilities. An Adobe Commerce flaw, CVE-2026-71362, came under attack shortly after its public disclosure. Similarly, a SharePoint vulnerability, CVE-2026-55040, is being exploited following the release of a public exploit. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added Metabase, Windows, and Cisco Secure Firewall flaws to its Known Exploited Vulnerabilities catalog, underscoring the urgency of patching these issues.
Ransomware continues to pose a significant threat, with the Storm-1175 group replacing its Medusa variant with a new ransomware called StormEncryptor. This new ransomware is suspected to be deployed via an N-central flaw. CISA, the FBI, and other partners have also issued warnings about the Gunra ransomware actors, who are actively targeting multiple critical infrastructure sectors.
Espionage campaigns remain prevalent, with APT36 suspected in the PATCHCORD operation, which utilizes Google Sheets for command and control (C2) communications. This campaign targets Afghan telecommunications and critical infrastructure in South Asia. The North Korean Lazarus Group is also reportedly leveraging a Windows zero-day vulnerability in its "Operation Dream Job."
In the realm of state-sponsored activity, China-linked hackers are deploying the new StormEncryptor ransomware and have been observed using AI agents in autonomous attacks against Taiwan.
Beyond these specific threats, a new malware combination dubbed WindRelay is behind a growing fraud scheme. Furthermore, a macOS screen sharing flaw is being exploited to deploy Monero cryptocurrency miners, and a GeoServer zero-day vulnerability is already being probed by attackers. Crooks are also actively purchasing expired domains to use them for malware delivery.
Finally, Apple has issued warnings to hundreds of users regarding mercenary spyware attacks, indicating a persistent threat from sophisticated surveillance tools.
A weakness has been identified in Tenda CP3 27.5.57.101. This issue affects some unknown processing of the file Net/NetCheckPing.cpp. This manipulation of the argument interface_name/host causes os command injection. The attack can be initiated remotely.
A security flaw has been discovered in Tenda CP3 27.5.57.101. This vulnerability affects the function SystemAsh of the file Apis/system.c of the component Kylin. The manipulation of the argument AlarmVoiceURL results in os command injection. It is possible to launch the attack remotely.

Attackers are exploiting a new unpatched vulnerability in Magento Open Source and Adobe Commerce that lets them run malicious code on an online store's server without logging in, Dutch e-commerce security company Sansec said in an advisory published on September 5. Sansec, which discovered the flaw and named it StyleSmuggler, said attacks started on September 4. "Sansec is publishing early
In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.

Attackers are exploiting two new PaperCut flaws to steal credentials and gain privileged access in education-sector attacks across the U.S. and Europe. Attackers are exploiting two recelty disclosed PaperCut flaws, CVE-2026-81578 and CVE-2026-82078, in attacks targeting schools and other education organizations in the U.S. and Europe, as reported by TheHackerNews. Arctic Wolf researchers observed

JetBrains is urging Cadence users to revoke and rotate all credentials following a security incident last month in which unidentified threat actors exploited a recently disclosed critical vulnerability in TeamCity to breach its own environment. "Cadence users should immediately revoke or rotate all credentials and secrets that may have been used to run their Cadence executions," JetBrains said.