Stay updated on the latest in information security flaws. Explore news, insights, and analysis on vulnerabilities affecting digital safety.
Search across headline titles and summaries.
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.
Semperis Warns of Flaw in Windows Server 2025 Delegated Managed Service AccountsA critical cryptographic flaw in Windows Server 2025's delegated Managed Service Accounts, or dMSAs, allows attackers to generate passwords for every managed service account across an Active Directory forest and create a backdoor, Semperis researchers found.
FBI Accuses Ukrainian Man of Identifying Exploitable Flaws in Victims' NetworksA 33-year-old Armenian man, Karen Vardanyan, accused of facilitating Ryuk ransomware attacks against numerous organizations, is due to stand trial in the U.S. in August. The FBI said the Ryuk operation earned at least $15 million in cryptocurrency ransom payments from victims.
Also: CISA Warns of Unpatched Train Brake VulnerabilityThis week: Louis Vuitton and Co-op confirm breaches, unpatched train brake flaw, Barclays fined £42M pounds for financial crime failures, secret U.K. program relocated thousands of Afghans, ex-soldier pleads guilty to hacking, Ukrainian hackers claim hit on Russian drone supplier.
Oracle Cloud Infrastructure Flaw Enabled Malicious File Uploads, Researchers FoundExploring Oracle Cloud Infrastructure, researchers at Tenable found that Oracle's console-based Code Editor tool failed to block arbitrary file uploads, and could be silently exploited via drive-by attacks to install malware. They said Oracle has now fixed the vulnerability.
Hacker Claims to Have Exploited Flaw in Oracle WebLogic Server, Sold Stolen DataSeychelles Commercial Bank is warning customers that a hacker stole their personal information - but no money - from their accounts after breaching its systems. The hacker involved claims to have stolen and sold two gigabytes of customer data from the bank, which paid no ransom.
Remote Code Execution Flaw Affects More Than 5,000 ServersThreat actors are actively exploiting a critical vulnerability in a server file transfer solution. Researchers say the flaw in Wing FTP Server could allow threat actors to execute system-level commands remotely, using null byte and Lua injection without authentication.
Ransomware Group Among Attackers Focused on Exploiting Citrix Netscaler FlawSecurity experts warn that attackers have ramped up their collective attempts to find and exploit Citrix NetScaler devices that remain unpatched. Cloud Security Group patched CVE-2025-5777, a flaw also known as "Citrix Bleed 2," nearly four weeks ago with a software update.
Bluetooth Flaws in Car Software Could Enable Hijacking of Infotainment SystemsA set of critical Bluetooth flaws in software that helps cars connect to phones and other devices could enable attackers to remotely take control of car infotainment systems used by major automakers including Mercedes-Benz, Skoda and Volkswagen, new research shows.