Summary
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.
- Vendor
- Roundcube
- Product
- Webmail
- Added to KEV
- Feb 20, 2026
- Remediation due
- Mar 13, 2026 (US federal deadline)
- Ransomware use
- Not known
- Weakness
- CWE-502
- EPSS
- 99.6% as of Nov 12
In the news
- No Asia-Pacific article names this CVE yet.
Linked
Actors named alongside it:
none
Incidents exploiting it:
- none recorded
References