CVE-2025-49113: RoundCube Webmail Deserialization of Untrusted Data Vulnerability

Added to the CISA Known Exploited Vulnerabilities catalog on 20 Feb 2026. Vendor: Roundcube. Product: Webmail.

RoundCube Webmail contains a deserialization of untrusted data vulnerability that allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due 13 Mar 2026)