OCTOBER 9, 2026
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Case File

CVE-2026-100389

HIGH · CVSS 8.1 EPSS 0.58% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-25 · Last synced 2026-10-09

CyberRota Analysis

AI-Generated

GestSup versions prior to 3.2.61 are vulnerable to a remote code execution flaw in the IMAP connector, allowing unauthenticated attackers to exploit improperly handled attachments. By sending emails with PHP files to monitored mailboxes, attackers can execute malicious code when these files are accessed from the web. Organizations using affected versions should prioritize patching to mitigate the risk of unauthorized access and potential system compromise.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
remote code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-100389
Severity
HIGH
CVSS
8.1
EPSS
0.58%

Original NVD 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.