Stay updated on the latest in information security flaws. Explore news, insights, and analysis on vulnerabilities affecting digital safety.
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Background for this topic.
A flaw is a defect in software, hardware, system design, or configuration that causes unintended behavior. In security reporting, the term usually means a weakness that could violate confidentiality, integrity, or availability when reached through a particular interface, input, privilege, or operating condition. Not every flaw is exploitable, and exploitability depends on factors such as exposure, authentication requirements, affected versions, and available mitigations.
Flaws matter because they can create attack paths in applications, operating systems, devices, APIs, or administrative settings. Security teams assess their severity and exposure, prioritize remediation, apply patches or configuration changes, and use isolation or access controls when immediate fixes are unavailable. Code review, testing, vulnerability scanning, and monitoring can reveal flaws across the development and operational lifecycle. Reports should distinguish a confirmed vulnerability from a theoretical defect and provide enough technical detail to support validation without unnecessarily enabling exploitation.
More than 200,000 WordPress websites are using a vulnerable version of the Post SMTP plugin that allows hackers to take control of the administrator account. [...]
Mitel Networks has released security updates to patch a critical-severity authentication bypass vulnerability impacting its MiVoice MX-ONE enterprise communications platform. [...]
SonicWall urges customers to patch SMA 100 series appliances against a critical authenticated arbitrary file upload vulnerability that can let attackers gain remote code execution. [...]
Cisco is warning that three recently patched critical remote code execution vulnerabilities in Cisco Identity Services Engine (ISE) are now being actively exploited in attacks. [...]
ExpressVPN has fixed a flaw in its Windows client that caused Remote Desktop Protocol (RDP) traffic to bypass the virtual private network (VPN) tunnel, exposing the users' real IP addresses. [...]
Microsoft has released emergency SharePoint security updates for two zero-day vulnerabilities tracked as CVE-2025-53770 and CVE-2025-53771 that have compromised services worldwide in "ToolShell" attacks. [...]