Daily Cybersecurity News Roundup – October 19, 2025

Stay updated with the latest cybersecurity news! This daily roundup covers critical vulnerabilities, emerging threats, and significant data breaches to keep you informed and secure in the ever-evolving digital landscape.

1. Europol Dismantles SIM Farm Network Powering 49 Million Fake Accounts Worldwide

Published: 2025-10-19

Europol announced the disruption of a sophisticated cybercrime-as-a-service platform operating a SIM farm that enabled various crimes like phishing and fraud, leading to arrests and seizures across multiple countries.

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2. PoC Exploit Released for Linux-PAM Vulnerability Allowing Root Privilege Escalation

Published: 2025-10-19

A high-severity vulnerability in the Pluggable Authentication Modules framework allows potential root privilege escalation through a released PoC exploit affecting Linux systems.

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3. New .NET CAPI Backdoor Targets Russian Auto and E-Commerce Firms via Phishing ZIPs

Published: 2025-10-18

Researchers detailed a campaign using phishing emails with ZIP archives to deploy a new .NET malware called CAPI Backdoor targeting Russian sectors.

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4. Silver Fox Expands Winos 4.0 Attacks to Japan and Malaysia via HoldingHands RAT

Published: 2025-10-18

Threat actors behind Winos 4.0 malware have broadened attacks to new regions using phishing emails with malicious PDFs.

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5. North Korean Hackers Combine BeaverTail and OtterCookie into Advanced JS Malware

Published: 2025-10-17

North Korean actors have merged malware functionalities, adding keylogging and screenshots in recent campaigns.

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6. Identity Security: Your First and Last Line of Defense

Published: 2025-10-17

AI agents’ risks highlight the importance of identity management in enterprise security against modern threats.

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7. Researchers Uncover WatchGuard VPN Bug That Could Let Attackers Take Over Devices

Published: 2025-10-17

A critical out-of-bounds write vulnerability in WatchGuard Fireware allows unauthenticated remote code execution, now patched.

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8. Microsoft Revokes 200 Fraudulent Certificates Used in Rhysida Ransomware Campaign

Published: 2025-10-17

Microsoft revoked certificates used by threat actors to sign malicious files in ransomware attacks involving Oyster backdoor.

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