CVE Watch—

CVE-2025-49113

RoundCube Webmail Deserialization of Untrusted Data Vulnerability

CVSS

—

No CVSS

EPSS

99.0%

p100

KEV

YES

Feb 20, 2026

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

98.9%EPSS · 30 days99.0%

2026-09-162026-10-14

KEV catalog record

Product

Roundcube / Webmail

Vulnerability

RoundCube Webmail Deserialization of Untrusted Data Vulnerability

Added to KEV

Feb 20, 2026

Remediate by

Mar 13, 2026

Known ransomware use

Summary description

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.

Notes

https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10 ; https://github.com/roundcube/roundcubemail/releases/tag/1.5.10 ; https://github.com/roundcube/roundcubemail/releases/tag/1.6.11 ; https://nvd.nist.gov/vuln/detail/CVE-2025-49113

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