RCE in Roundcube Webmail
CVE-2026-75007
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the LDAP search filter was subject to injection via unescaped %u/%fu/%d substitution, which may lead to information disclosure or privilege escalation.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.003
Affected products
- Roundcube Webmail — versions 1.6.0, 1.7.0
Weakness classification (CWE)
References
- github.com/roundcube/roundcubemail/commit/0893e192adf803c7a5a89fafc80278257e1bc… (Patch)
- github.com/roundcube/roundcubemail/commit/e6cc1e121effeaec6d916feb4e019d2828924… (Patch)
- github.com/roundcube/roundcubemail/releases/tag/1.6.18 (Release Notes)
- github.com/roundcube/roundcubemail/releases/tag/1.7.3 (Release Notes)
- roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-75007?
- CVE-2026-75007 is a medium-severity vulnerability in Roundcube Webmail, classified under Command Injection. CVSS score: 5.4/10. Published 2026-08-17.
- How severe is CVE-2026-75007?
- Medium severity. CVSS v3 base score is 5.4 out of 10.