Your webmail is a silent gateway for state-sponsored data theft. 📧
CVE-2025-49113 · Severity 9.9 · Critical deserialization vulnerability in Roundcube Webmail.
The @[CISA](urn:li:organization:13010360) has recently added this to the KEV catalog as APT groups continue to exploit unpatched servers. This flaw allows an unauthenticated attacker to execute arbitrary code and gain access to sensitive mail data.
We are seeing a surge in automated scanning for this specific vulnerability. Because webmail is often exposed to the public internet, it serves as a low-resistance entry point for lateral movement into the broader corporate network.
The uncomfortable truth: If your webmail is unpatched, your private communications have likely already been ingested by an automated collection script.
→ Update Roundcube Webmail to the latest stable 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.
Are you still running legacy on-premise webmail interfaces exposed to the public internet? 👇
#Cybersecurity #EmailSecurity #ThreatIntelligence #SecurityLeadership #vCISO #CodeDefence