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Hackers now exploit critical Roundcube flaw in code injection attacks
September 24, 2026 · BleepingComputer · Severity: CRITICAL
A high-severity Roundcube Webmail vulnerability patched in May is now being actively exploited in attacks, according to the Canadian Centre for Cyber Security.
Key Takeaways
- According to BleepingComputer, this development highlights evolving cybersecurity challenges that security teams should monitor for potential organizational impact.
- Given the CRITICAL severity rating, organizations should prioritize remediation in their vulnerability management workflow and apply available patches urgently.
- Security teams should review their exposure to this threat and implement appropriate defensive controls to protect their organization's infrastructure and data assets.