Your webmail is currently the lowest-resistance path for data theft. 📧
CVE-2025-49113 · Severity 9.9 · Critical deserialization vulnerability in Roundcube Webmail.
The @[CISA](urn:li:organization:13010360) has added this to the KEV catalog as global exploitation spikes. This flaw allow unauthenticated attackers to execute arbitrary code simply by sending a malicious request to an unpatched mail server.
We are seeing automated scripts harvesting credentials and exfiltrating private communications at scale. Because webmail is usually public-facing, it serves as the perfect initial entry point for broader network compromise.
The uncomfortable truth: If your webmail is unpatched, you should assume that your internal executive communications are no longer private.
→ Update Roundcube Webmail to the latest security release (1.6.11+) immediately.
→ Audit mail server logs for unauthorized PHP object deserialization attempts.
→ Review your DMZ architecture to ensure mail servers are properly segmented from internal assets.
Is your webmail interface still exposed to the internet without a Web Application Firewall? 👇
#Cybersecurity #EmailSecurity #ZeroTrust #VulnerabilityManagement #SOC #CodeDefence