The true cost of a ransomware attack, with and without BCDR

The ransom itself can be only a fraction of the total cost of a ransomware attack, with downtime, recovery, remediation, and legal obligations adding millions to the bill. Datto explains how a mature BCDR strategy can reduce downtime and provide a faster, more predictable path to recovery. [...]

https://www.bleepingcomputer.com/news/security/the-true-cost-of-a-ransomware-attack-with-and-without-bcdr/

 Spain reports first alleged AI-powered data theft attack

The Spanish Data Protection Agency (AEPD) was notified of an attack allegedly carried out with an AI agent powered by a known large language model (LLM). [...]

https://www.bleepingcomputer.com/news/security/spain-reports-first-alleged-ai-powered-data-theft-attack/

 Malware bypasses browser checks to force install Chrome, Edge extensions

A banking malware operation active since mid-2025 has been using a toolkit named KREMLIN to install malicious Chrome and Edge extensions that steal credentials, session tokens, and sensitive data. [...]

https://www.bleepingcomputer.com/news/security/malware-bypasses-browser-checks-to-force-install-chrome-edge-extensions/

 Iranian hackers use CHOSEN BRICK Windows malware to spy on targets

Government agencies are warning that Iranian state-linked hackers are using a Windows malware strain named CHOSEN BRICK to target dissidents, activists, and journalists worldwide. [...]

https://www.bleepingcomputer.com/news/security/iranian-hackers-use-chosen-brick-windows-malware-to-spy-on-targets/

 Windows 11 KB5124008 update breaks domain trust for some users

Microsoft is investigating reports that the Windows 11 KB5124008 security update is breaking domain trust relationships on some enterprise systems, preventing users from logging in with valid domain credentials. [...]

https://www.bleepingcomputer.com/news/microsoft/windows-11-kb5124008-update-breaks-domain-trust-for-some-users/

 Anthropic wants Claude to analyze your bank account and financial data

Anthropic is testing a new personal finance feature called "Claude Money" that will allow you to connect your bank accounts directly to Claude and "understand your money." [...]

https://www.bleepingcomputer.com/news/artificial-intelligence/anthropic-wants-claude-to-analyze-your-bank-account-and-financial-data/

 Cisco warns of max severity ISE zero-day exploited in attacks

Cisco has released security updates to address a maximum-severity Identity Services Engine vulnerability that attackers are actively exploiting in the wild. [...]

https://www.bleepingcomputer.com/news/security/cisco-warns-of-identity-service-engine-zero-day-exploited-in-attacks/

 Microsoft shares workaround for Windows domain login issues

Microsoft shared a temporary fix on Wednesday for a known issue that prevents Windows 11 users from logging in with valid domain credentials after installing the September 2026 security updates. [...]

https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-workaround-for-windows-domain-login-authentication-issues/

 Chinese hackers use SparroWocky malware in govt espionage attacks

The China-linked espionage group FamousSparrow has been using a new backdoor named SparroWocky in attacks on government organizations in Latin America. [...]

https://www.bleepingcomputer.com/news/security/chinese-hackers-use-sparrowocky-malware-in-govt-espionage-attacks/

 US takes down NightmareStresser DDoS-for-hire platform

The U.S. Federal Bureau of Investigation (FBI) seized the domains used by NightmareStresser, one of the world's longest-running distributed denial-of-service (DDoS) platforms. [...]

https://www.bleepingcomputer.com/news/security/fbi-seizes-nightmarestresser-service-linked-to-thousands-of-ddos-attacks/

 Windows 11 24H2 Home and Pro reach end of support in October

Microsoft reminded customers this week that devices running Windows 11 24H2 Home and Pro editions will stop receiving updates next month. [...]

https://www.bleepingcomputer.com/news/microsoft/windows-11-24h2-home-and-pro-reach-end-of-support-in-october/

 What Recent AI-Powered Attacks Mean for Your Identity Security

AI is making credential theft faster and easier to scale, giving attackers more opportunities to abuse valid identities. Specops explains why identity security must go beyond successful authentication by verifying that both the user and the device requesting access can be trusted. [...]

https://www.bleepingcomputer.com/news/security/what-recent-ai-powered-attacks-mean-for-your-identity-security/

 Brevo supply-chain attack injected ClickFix scripts on customer sites

Brevo confirmed that attackers stole a Cloudflare API key and used it to inject malicious ClickFix scripts into its websites and JavaScript files embedded on customer sites to distribute malware. [...]

https://www.bleepingcomputer.com/news/security/brevo-supply-chain-attack-injected-clickfix-scripts-on-customer-sites/

 OpenAI details more cases of AI agents taking unauthorized actions

OpenAI has presented new examples of what they call "AI model misalignment" from the past six months, including unauthorized file uploads, following self-generated instructions, hiding mistakes, and leveraging exposed API keys. [...]

https://www.bleepingcomputer.com/news/security/openai-details-more-cases-of-ai-agents-taking-unauthorized-actions/

 New RatHat Android malware uses AI to automate device control

A new Android malware called RatHat has been discovered, targeting users with an AI-powered subsystem that helps operators remotely navigate compromised devices. [...]

https://www.bleepingcomputer.com/news/security/new-rathat-android-malware-uses-ai-to-automate-device-control/

 Microsoft fixes broken copy and paste for Excel 2016 users

Microsoft has fixed a known issue that causes copy-and-paste failures for some Excel users after installing the September 2026 KB5002914 security update. [...]

https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-broken-copy-and-paste-for-excel-2016-users/

 New Check Point flaw lets hackers execute code with root privileges

Check Point Software has released security updates to address a critical vulnerability that can let attackers execute code with root privileges on management systems. [...]

https://www.bleepingcomputer.com/news/security/check-point-warns-critical-flaw-lets-hackers-execute-code-as-root/

 Microsoft fixes bug behind ‘Defender Antivirus is turned off’ alerts

Microsoft has resolved a known issue that causes incorrect alerts warning that Defender Antivirus was turned off after installing recent updates. [...]

https://www.bleepingcomputer.com/news/security/microsoft-fixes-bug-behind-defender-antivirus-is-turned-off-alerts/

 Webinar: Which Google Workspace security controls actually matter?

Fast-growing companies face countless recommendations for securing Google Workspace, but not every control provides the same value. This webinar examines real-world breaches to explore which security controls matter most, which may be overrated, and where lean security teams should focus their resources. [...]

https://www.bleepingcomputer.com/news/security/webinar-which-google-workspace-security-controls-actually-matter/

 Microsoft Teams will let admins block custom file extensions

Microsoft Teams will soon let administrators tweak the list of file extensions commonly associated with security threats to meet their company's security requirements. [...]

https://www.bleepingcomputer.com/news/security/microsoft-teams-will-let-admins-block-custom-file-extensions/

 Secure enterprise sharing with access reviews for Microsoft 365

Microsoft 365 makes sharing files easy, but access can remain long after its original purpose has ended, leaving organizations with little visibility into who can still reach sensitive data. tenfold Software explains how centralized access governance and owner-driven reviews can help identify and remove unnecessary access. [...]

https://www.bleepingcomputer.com/news/security/secure-enterprise-sharing-with-access-reviews-for-microsoft-365/