Breaking: Critical SonicWall Vulnerability Threatens UK Small Businesses
Arctic Wolf researchers identified a surge in ransomware attacks targeting SonicWall devices since July 15th, 2025. The Akira ransomware gang exploits a zero-day vulnerability bypassing traditional security measures, affecting thousands of UK SMEs.
Why This Attack Is Different:
Impact on UK Small Business:SonicWall devices are popular among UK SMEs for enterprise-grade security at accessible prices. Documented breaches accessed 30 months of sensitive data including employee records, salaries, supplier payments, and customer financial information.
Immediate Actions Required:
1. Monitor SSL VPN Logs: Check for authentication attempts from hosting providers rather than typical business connections.
2. Disable SSL VPN: Arctic Wolf recommends disabling services until patches available.
3. Reset Credentials: Change all VPN passwords, verify MFA, remove unused accounts.
4. Review Network Segmentation: Prevent lateral movement targeting virtual machines and backup systems.
Additional Threats To watch for:
Expert Analysis:This demonstrates why effective cybersecurity requires more than security appliances. Modern threats demand ongoing monitoring, proactive assessment, and rapid reconfiguration capabilities. The compressed timeline makes internal response nearly impossible for small businesses.
Key Terms:
Sources:
The 10-Minute Cyber Fix: Daily cybersecurity intelligence for UK businesses. Sponsored by Equate Group - Visit equategroup.com
Read by Lucy Harper and Graham Faulkner
Written and Produced by The Small Business Cyber Security Guy