What’s Vulnerable › Vulnerabilities

CVE-2026-75007

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-17 · updated 2026-09-08
• Weakness: CWE-77

Description

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.

Affected products

• Roundcube Webmail: from 1.6.0 before 1.6.18; from 1.7.0 before 1.7.3 — fixed in 1.6.18, 1.7.3

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.6.18, 1.7.3. Check the vendor advisory for mitigations.

References

• https://github.com/roundcube/roundcubemail/commit/0893e192adf803c7a5a89fafc80278257e1bcf65
• https://github.com/roundcube/roundcubemail/commit/e6cc1e121effeaec6d916feb4e019d2828924540
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
• https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
• https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3

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