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Google Patches Active Sandbox Escape Zero-Day CVE-2025-6558 in Chrome

Luciano Ferrari

20 Oct 2025 — 2 min read

Monday, October 20, 2025

Top 5 Cybersecurity Stories You Should Know

Google Patches Active Sandbox Escape Zero-Day CVE-2025-6558 in Chrome — tl;dr: Google has released a critical security update for Chrome to address six vulnerabilities, including the actively exploited sandbox escape zero-day CVE-2025-6558, rated 8.8 in severity. Discovered by Google's Threat Analysis Group, this flaw allows attackers to execute arbitrary code via a specially crafted HTML page, compromising the browser's sandbox protection. Users are urged to update to Chrome version 138.0.7204.157 or .158 immediately to mitigate risks. This marks the fifth actively exploited flaw fixed in Chrome this year, emphasizing the importance of timely updates to maintain security.
↪ https://www.bleepingcomputer.com/news/security/google-fixes-actively-exploited-sandbox-escape-zero-day-in-chrome/
Philippines Sees 49% Surge in Cyberattacks, Healthcare Sector Most Affected — tl;dr: In Q3 2025, the Philippines reported a staggering 49% increase in cyberattacks, with over 52 million user credentials compromised, as highlighted in Viettel Cyber Security's Cyber Threat Landscape Report. The healthcare sector emerged as the primary target, suffering from ransomware attacks that disrupt operations. Other sectors like finance and e-commerce are also vulnerable. To combat these threats, organizations are urged to implement a four-pronged resilience strategy: regular system patching, offline data backups, continuous employee training, and 24/7 threat monitoring through managed Security Operations Centers.
↪ https://insiderph.com/cyberattacks-surge-49-in-ph-healthcare-becomes-top-target
Major US Government Data Breach: FEMA and CBP Exposed via Citrix Vulnerability — tl;dr: On October 20, 2025, the US Department of Homeland Security confirmed a significant data breach affecting employees of FEMA and CBP, attributed to a vulnerability in Citrix remote access software (CVE-2025-5777). The attack, which began in June 2025, compromised sensitive employee data, including employment records and internal communications. As a result, approximately two dozen FEMA IT staff were terminated due to systemic cybersecurity failures. This incident underscores the urgent need for enhanced patch management and cybersecurity practices across federal agencies to prevent similar breaches in the future.
↪ https://www.cybernewscentre.com/20-october-2025-us-government-data-breach-fema-cbp/
October is Cybersecurity Awareness Month: Strengthening Critical Infrastructure — tl;dr: October marks Cybersecurity Awareness Month, emphasizing the importance of safeguarding the nation's critical infrastructure, primarily managed by state, local, tribal, and territorial governments, as well as small and medium businesses. This year's theme, 'Building a Cyber Strong America,' calls for immediate action from these entities to enhance their cybersecurity measures. The Cybersecurity and Infrastructure Security Agency (CISA) encourages organizations to adopt best practices to protect against cyber threats that can disrupt essential services and compromise sensitive data. Resources and toolkits are available to assist in these efforts.
↪ https://www.cisa.gov/cybersecurity-awareness-month
CISA Issues Emergency Directives for F5 and Cisco Vulnerabilities — tl;dr: The Cybersecurity and Infrastructure Security Agency (CISA) has issued Emergency Directives 26-01 and 25-03, urging federal agencies to address critical vulnerabilities in F5 and Cisco devices, respectively. These directives aim to mitigate ongoing exploitation risks posed by nation-state threat actors. Organizations using these products must prioritize identifying and patching vulnerabilities to enhance their cybersecurity posture. CISA emphasizes the importance of proactive threat monitoring and timely updates to safeguard essential infrastructure and services. Stakeholders are encouraged to stay informed and utilize CISA's resources for further guidance.
↪ https://www.cisa.gov/