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CISA Alerts on SmarterMail RCE Flaw (CVE-2026-24423) Exploited in Ransomware

Luciano Ferrari

09 Feb 2026 — 2 min read

Monday, February 9, 2026

Top 5 Cybersecurity Stories You Should Know

CISA Alerts on SmarterMail RCE Flaw (CVE-2026-24423) Exploited in Ransomware — tl;dr: The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning regarding CVE-2026-24423, a critical remote code execution vulnerability in SmarterMail, a popular email server platform. This flaw, affecting versions prior to build 9511, allows attackers to execute commands without authentication, posing significant risks to managed service providers and businesses using the software. CISA has added this vulnerability to its Known Exploited Vulnerabilities catalog, urging affected entities to apply the latest security updates or discontinue use by February 26, 2026, following a recent patch release by SmarterTools.
↪ https://www.bleepingcomputer.com/news/security/cisa-warns-of-smartermail-rce-flaw-used-in-ransomware-attacks/
Chrome Zero-Day CVE-2025-6554 Highlights Need for Zero Trust Browser Security — tl;dr: The recently discovered Chrome zero-day vulnerability, CVE-2025-6554, underscores the critical importance of browser security in today's digital landscape. Attackers are increasingly exploiting browser vulnerabilities, often before patches are available, putting sensitive data and business operations at risk. Organizations are urged to adopt a layered Zero Trust security approach, moving beyond traditional defenses. Regularly updating browsers and employing real-time protection solutions, like the Menlo Secure Cloud Browser, can significantly mitigate risks associated with such vulnerabilities.
↪ https://www.linkedin.com/posts/menlo-security_chrome-zero-day-why-browser-security-is-activity-7348477992660070416-sdcJ
CISA Addresses Cyber Threats: Focus on Ransomware and Vulnerabilities — tl;dr: The Cybersecurity and Infrastructure Security Agency (CISA) is actively tracking and sharing vital information on evolving cyber threats, including malware, phishing, and ransomware. With nation-state actors exploiting vulnerabilities, CISA emphasizes that all cyber-attacks pose a risk to national security. Organizations are encouraged to utilize CISA's resources, such as the Known Exploited Vulnerabilities Catalog and the StopRansomware initiative, to prioritize their cybersecurity measures. By staying informed and implementing recommended best practices, businesses and individuals can strengthen their defenses against these persistent threats.
↪ https://www.cisa.gov/topics/cyber-threats-and-advisories
Understanding Information Security (Infosec): Key Principles and Importance — tl;dr: Information security, or infosec, encompasses policies and procedures to protect sensitive data from unauthorized access, modification, and destruction. It is crucial for safeguarding an organization's most valuable asset—its data—against cyber threats, financial losses, and reputational damage. The core principles of infosec include confidentiality, integrity, and availability, collectively known as the CIA triad. Organizations must also consider risk management, data classification, and compliance with regulations like GDPR and HIPAA. Implementing robust infosec practices is essential for maintaining trust and operational resilience in today's digital landscape.
↪ https://www.techtarget.com/searchsecurity/definition/information-security-infosec
CISA Cybersecurity Best Practices for Individuals and Organizations — tl;dr: The Cybersecurity and Infrastructure Security Agency (CISA) offers essential cybersecurity best practices aimed at helping individuals and organizations mitigate cyber risks. Key recommendations include using strong passwords, enabling multi-factor authentication, and regularly updating software. CISA emphasizes the importance of tailored cybersecurity plans to protect against potential cyber threats. As cyber incidents can disrupt critical infrastructure and daily life, adopting these practices is crucial for enhancing online safety and resilience. CISA also provides resources and training to support stakeholders in improving their cybersecurity posture.
↪ https://www.cisa.gov/topics/cybersecurity-best-practices