CVE WatchSep 30, 2026

CVE-2026-100389

GestSup versions before 3.2.62 contain a remote code execution vulnerability in the basic IMAP connector's attachment handling that fails to

CVSS

8.1

High

EPSS

0.6%

p47

KEV

—

Exploit Today

0-100

Published: Sep 25, 2026 · Last modified: Sep 30, 2026 · CWE-434

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-09-262026-10-25

Technical description

GestSup versions before 3.2.62 contain a remote code execution vulnerability in the basic IMAP connector's attachment handling that fails to skip blocked file extensions. Unauthenticated attackers can send emails with PHP attachments to monitored mailboxes, which are written to the web-accessible upload/ticket directory and executed when accessed.

Official references

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