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Home » Critical Cyber Threats: Fortinet Exploit, Chrome 0-Day, Record DDoS & More!

Critical Cyber Threats: Fortinet Exploit, Chrome 0-Day, Record DDoS & More!

Staff WriterBy Staff WriterNovember 24, 2025No Comments2 Mins Read1 Views
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Summary Points

  1. New Exploits Exposed: Hackers leveraged vulnerabilities in Fortinet and Google Chrome this week, with active exploitation of FortiWeb flaws and an urgent patch for a Chrome zero-day (CVE-2025-13223) rated 8.8 for severity.

  2. Supply Chain Risk Intensified: Salesforce reported unauthorized access linked to Gainsight apps, highlighting the danger posed by SaaS integrations that can compromise multiple systems through a single breach.

  3. Record DDoS Attack Neutralized: Microsoft mitigated a staggering 15.72 Tbps DDoS attack, the largest recorded in cloud history, showcasing the escalating scale of security threats from IoT-based botnets.

  4. Emerging Phishing Schemes: New phishing tactics targeting WhatsApp accounts have exploited cloned login interfaces, impacting hundreds and utilizing urgency-driven tactics to deceive users into revealing authentication credentials.

⚡ Threat of the Week

This week, cybersecurity faced significant challenges as hackers exploited vulnerabilities in Fortinet and Chrome. Fortinet issued a warning about a medium-severity flaw in FortiWeb, identified as CVE-2025-58034. This security weakness allows authenticated attackers to execute unauthorized commands, potentially compromising systems. Orange Cyberdefense detected various campaigns linking this flaw with a recently patched vulnerability, raising concerns about Fortinet’s transparency in disclosure.

Meanwhile, Google announced an urgent update for its Chrome browser. A critical zero-day vulnerability, CVE-2025-13223, became a target in active exploitation. This flaw, related to JavaScript and WebAssembly, could allow hackers to execute arbitrary code. Google has now addressed several critical vulnerabilities this year, emphasizing the ever-evolving landscape of cyber threats.

🔔 Top News

In other news, a record DDoS attack has tested Microsoft’s defenses, reaching an unprecedented 15.72 terabits per second. While the target remains undisclosed, the attack signifies the increasing power of DDoS for-hire operations. Additionally, Salesforce reported unusual activity linked to Gainsight applications, prompting immediate action to revoke access and enhance security protocols. This breach highlights the vulnerabilities present in SaaS integrations.

New phishing schemes also emerged, specifically targeting WhatsApp users through cloned login portals. The attackers have utilized over 9,000 phishing URLs, exploiting low-regulation domains to execute their schemes. This rising trend of sophisticated phishing attacks accentuates the ongoing need for vigilance and user education in cybersecurity practices.

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John Marcelli is a staff writer for the CISO Brief, with a passion for exploring and writing about the ever-evolving world of technology. From emerging trends to in-depth reviews of the latest gadgets, John stays at the forefront of innovation, delivering engaging content that informs and inspires readers. When he's not writing, he enjoys experimenting with new tech tools and diving into the digital landscape.

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