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Roundcube security advisory (AV26-503) – Update 1

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Roundcube security advisory (AV26-503) – Update 1

Roundcube published security advisories on May 25, 2026, to address vulnerabilities in Webmail versions prior to 1.6.16 and 1.7.1. An update on September 21, 2026, confirmed that CVE-2026-48842 is being actively exploited in the wild, prompting the Cyber Centre to recommend immediate patching.

Why it matters: Organizations running Roundcube Webmail must update to version 1.6.16 or 1.7.1 immediately, as CVE-2026-48842 is under active exploitation.

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vulnerabilities

Roundcube security advisory (AV26-503) – Update 1

Roundcube published security advisories on May 25, 2026, addressing vulnerabilities in Webmail versions prior to 1.6.16 and 1.7.1. CVE-2026-48842 (CVSS 8.1) is reported to be exploited in the wild, prompting users and administrators to apply available updates.

Why it matters: Organizations running Roundcube Webmail before versions 1.6.16 or 1.7.1 face active exploitation of CVE-2026-48842 and must patch immediately to prevent compromise.

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