---
id: CVE-2026-75007
title: >-
  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.
summary: >-
  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.
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-77
vendor: roundcube
product: webmail
affected:
  - 'webmail >= 1.6.0, < 1.6.18'
  - 'webmail >= 1.7.0, < 1.7.3'
patched:
  - webmail 1.7.3
published: '2026-08-17'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T16:49:25.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75007'
references:
  - url: >-
      https://github.com/roundcube/roundcubemail/commit/0893e192adf803c7a5a89fafc80278257e1bcf65
    label: cve@mitre.org
  - url: >-
      https://github.com/roundcube/roundcubemail/commit/e6cc1e121effeaec6d916feb4e019d2828924540
    label: cve@mitre.org
  - url: 'https://github.com/roundcube/roundcubemail/releases/tag/1.6.18'
    label: cve@mitre.org
  - url: 'https://github.com/roundcube/roundcubemail/releases/tag/1.7.3'
    label: cve@mitre.org
  - url: 'https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00353
epssPercentile: 0.28994
ingestedAt: '2026-09-08T17:06:31.876Z'
---

## Overview

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

- `webmail >= 1.6.0, < 1.6.18`
- `webmail >= 1.7.0, < 1.7.3`

## Remediation

Upgrade past the affected range:

- `webmail 1.7.3`