CERT-In Browser Warning: CERT-In issues a high-severity alert for Chrome and Firefox users in India, urging immediate browser updates to prevent data theft and hacking risks.
New Delhi | October 21, 2025 | The Interview Times — The Indian Computer Emergency Response Team (CERT–In) has issued a high-severity browser warning for all Google Chrome and Mozilla Firefox users, citing multiple critical vulnerabilities that could allow hackers to steal personal data or gain full control of affected systems. The official CERT-In browser warning urges users to update immediately to avoid potential cyberattacks.
What the CERT-In Browser Warning Says
In its advisory released on October 21, 2025, CERT-In revealed that the vulnerabilities affect Chrome’s WebGPU and Video components, as well as Firefox’s Graphics and JavaScript Engine. The flaws, caused by heap buffer overflow, memory corruption, and integer overflow bugs, could enable remote code execution, allowing attackers to run malicious commands, steal data, or crash entire systems.
For Firefox, the agency highlighted issues with cookie storage isolation and graphics rendering, while Chrome’s flaws lie in its rendering engine, making it vulnerable to remote code execution attacks through maliciously designed websites. The CERT-In browser warning stresses that even visiting an infected website could compromise an unpatched system.
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Who Is at Risk
According to the advisory, Chrome users running versions prior to 141.0.7390.65/.66 on Windows and Mac, and 141.0.7390.65 on Linux, are affected.
Mozilla users are vulnerable if running Firefox before 144, Firefox ESR before 115.29 and 140.4, and Thunderbird before 140.4.
The CERT-In browser warning extends to users on Windows, macOS, Linux, and Android, covering a significant share of India’s 800 million internet users. The agency classified the threat level as “High” and urged both individuals and organizations to apply browser updates without delay.
Immediate Actions Recommended
CERT-In recommends upgrading to the following safe versions immediately:
- Google Chrome: 141.0.7390.65/.66 (Windows and Mac), 141.0.7390.65 (Linux)
- Mozilla Firefox: 144
- Firefox ESR: 115.29 and 140.4
- Mozilla Thunderbird: 140.4
Users are also advised to avoid untrusted links, refrain from visiting suspicious websites, and enable automatic browser updates to stay protected. The CERT-In browser warning emphasizes that outdated browsers are the most common entry point for cyberattacks.
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Expert and Industry Reactions
Cybersecurity specialists have backed the CERT-In browser warning, calling it a necessary measure amid rising browser-based cyber threats. According to experts, such vulnerabilities are often exploited by attackers through unpatched browsers, especially those used for financial transactions or government portals.
Both Google and Mozilla confirmed that they have already issued patches and, as of now, no active exploitation has been detected. However, experts caution that delayed updates could still leave millions exposed to zero-day vulnerabilities.
Rising Browser-Based Threats in India
India’s rapidly growing internet user base makes it a lucrative target for cybercriminals. According to CERT-In data, over 140,000 browser-related attacks were recorded last year, with Chrome and Firefox among the most targeted.
The CERT-In browser warning reflects an urgent need for improved digital hygiene and proactive cybersecurity habits.
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Stay Protected: Follow CERT-In’s Advice
Users are urged to:
- Keep browsers updated to the latest versions
- Enable automatic updates
- Avoid downloading extensions from unverified sources
- Refrain from clicking suspicious email links or pop-ups
As browser vulnerabilities continue to evolve, following the CERT-In browser warning is crucial for ensuring personal and organizational cybersecurity. Regular updates and cautious browsing can significantly reduce the risk of data theft, malware, and remote hijacking.
Key Takeaways — CERT-In Browser Warning
- CERT-In issues a high-severity alert for Google Chrome and Mozilla Firefox users across India over critical security flaws.
- Vulnerabilities in Chrome’s WebGPU and Firefox’s JavaScript Engine could allow remote code execution and data theft.
- Affected versions include Chrome before 141.0.7390.65/.66 and Firefox before version 144.
- Immediate browser updates are strongly advised to prevent hacking, malware, or system hijacking.
- CERT-In browser warning applies to Windows, macOS, Linux, and Android users.
- Both Google and Mozilla have released patches; no active exploitation detected yet.
- India recorded over 140,000 browser-related cyberattacks last year, showing rising threats.
- Users should enable automatic updates and avoid suspicious links or websites to stay secure.