Critical Google Chrome Zero-Day CVE-2025-2783 Exploited to Deploy Trinper Backdoor

TL;DR

A critical zero-day vulnerability in Google Chrome, tracked as CVE-2025-2783, was exploited by a threat actor known as TaxOff to deploy the Trinper backdoor in mid-March 2025.

• The flaw, now patched, allowed for sandbox escape and was identified by Positive Technologies.
• Google addressed the issue after Kaspersky reported in-the-wild attacks.

Critical Google Chrome Zero-Day Exploited by TaxOff

In mid-March 2025, a significant zero-day vulnerability in Google Chrome was exploited by a threat actor identified as TaxOff. This security flaw, tracked as CVE-2025-2783, involved a sandbox escape vulnerability with a CVSS score of 8.3. The exploit was used to deploy a backdoor codenamed Trinper, as observed by Positive Technologies.

Details of the Vulnerability

The vulnerability, CVE-2025-2783, allowed attackers to escape the browser’s sandbox, a crucial security feature designed to isolate processes and prevent malicious code from affecting the system. This flaw was particularly dangerous because it enabled attackers to execute arbitrary code outside the confines of the browser, compromising the entire system.

Discovery and Patch

The issue was first detected by Positive Technologies, who observed the exploit in action. Google promptly addressed the flaw later that month after Kaspersky reported active exploitation in the wild. The swift response from Google was crucial in mitigating further damage and protecting users from potential attacks.

Implications and Impact

The exploitation of CVE-2025-2783 highlights the ongoing challenge of securing web browsers against sophisticated threats. Google Chrome, despite its robust security features, remains a target for cybercriminals due to its widespread use. This incident underscores the importance of regular updates and vigilant monitoring by security researchers.

Conclusion

The discovery and patching of CVE-2025-2783 demonstrate the continuous efforts required to maintain the security of widely-used software like Google Chrome. As cyber threats evolve, so must the strategies to counter them. Users are advised to keep their browsers up-to-date and follow best practices for online security to minimize risks.

Additional Resources

For further insights, check:

• The Hacker News Article

References