Active Exploitation of WinRAR Zero-Day Path Traversal Vulnerability

CVE-2025-5086, a critical deserialization flaw in Dassault Systèmes DELMIA Apriso Manufacturing Operations Management (MOM) software, is being actively exploited. The vulnerability, with a CVSS score of 9.0, affects versions from Release 2020 through Release 2025. Exploitation attempts have been observed, targeting the /apriso/WebServices/FlexNetOperationsService.svc/Invoke endpoint with a Base64-encoded payload. The payload decodes to a GZIP-compressed Windows executable that deploys a malicious program designed to spy on user activities. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added the flaw to its Known Exploited Vulnerabilities (KEV) catalog, advising Federal Civilian Executive Branch (FCEB) agencies to apply updates by October 2, 2025. The malware, identified as Trojan.MSIL.Zapchast.gen, captures keyboard input, takes screenshots, and gathers information about active applications. This information is then sent to the attacker via various means, including email, FTP, and HTTP. The exploit involves sending a malicious SOAP request to vulnerable endpoints. The malicious requests were observed originating from the IP 156.244.33[.]162.

U.S. Senator Ron Wyden has called for an FTC investigation into Microsoft's cybersecurity practices, citing the company's support for RC4 encryption and insecure default settings that facilitated a ransomware attack on the Ascension healthcare network. The attack, attributed to the Black Basta ransomware group, compromised nearly 5.6 million individuals' personal and medical information. The breach occurred when a contractor's system was infected via a malicious link on Microsoft's Bing search engine. Attackers exploited insecure default settings and Kerberoasting techniques to gain elevated access to Ascension's network. Microsoft has acknowledged the vulnerabilities and plans to deprecate RC4 support in future updates. Wyden has criticized Microsoft for not clearly warning customers about the risks associated with RC4 encryption and for not taking decisive action to mitigate security risks.

The Akira ransomware group has been actively exploiting SonicWall SSL VPN flaws and misconfigurations to gain initial access to networks. This campaign has seen increased activity since late July 2025, targeting SonicWall devices to facilitate ransomware operations. The group leverages a combination of security vulnerabilities, including a year-old flaw (CVE-2024-40766) and misconfigured LDAP settings, to bypass access controls and infiltrate networks. Organizations are advised to rotate passwords, remove unused accounts, enable multi-factor authentication, and restrict access to the Virtual Office Portal to mitigate risks. The Australian Cyber Security Centre (ACSC) has acknowledged Akira's targeting of SonicWall SSL VPNs and issued alerts about the increased exploitation of CVE-2024-40766.

A flaw in the Cursor AI code editor allows malicious repositories to execute arbitrary code automatically when opened. This vulnerability can lead to malware installation, environment hijacking, and credential theft. Cursor, an AI-powered IDE based on Visual Studio Code, disables the Workspace Trust feature by default, allowing this behavior. The flaw affects one million users who generate over a billion lines of code daily. Cursor developers have decided not to fix the issue, citing the need to maintain AI and other features. The vulnerability is part of a broader trend of prompt injections and jailbreaks affecting AI-powered coding and reasoning agents, which can embed malicious instructions to perform harmful actions or leak data.

Microsoft released updates for 80 vulnerabilities on September 2025 Patch Tuesday. None of these vulnerabilities were zero-days. The updates address eight critical flaws, including five remote code execution vulnerabilities, one information disclosure, and two elevation of privilege vulnerabilities. The vulnerabilities span various categories: 38 elevation of privilege, 2 security feature bypass, 22 remote code execution, 14 information disclosure, 3 denial of service, and 1 spoofing. One zero-day vulnerability was fixed in Windows SMB Server. The updates also include hardening features for SMB Server to mitigate relay attacks, with recommendations for administrators to enable auditing. The patch includes 38 elevation of privilege vulnerabilities, the highest number among all categories. CVE-2025-54918 is an EoP vulnerability in Windows NT LAN Manager (NTLM) marked as critical. CVE-2025-54111 and CVE-2025-54913 are EoP flaws in Windows UI XAML, allowing privilege escalation via phished credentials or malicious Microsoft Store apps. CVE-2025-55232 is an RCE vulnerability in the Microsoft High Performance Compute (HPC) Pack with a CVSS score of 9.8. CVE-2025-54916 is an RCE vulnerability in Windows NTFS that can be triggered by authenticated users. Microsoft's patch update includes recommendations for preparing for the end-of-life of Windows 10 and mandatory multifactor authentication (MFA) for Azure in October 2025.