CVE-2018-6221

HIGH

Trend Micro Email Encryption Gateway 5.5 - Unvalidated Software Update

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-6221. PoCs published by Core Security.

AI-analyzed exploit summary This exploit demonstrates a man-in-the-middle attack against Trend Micro Email Encryption Gateway's insecure update mechanism, allowing arbitrary file writes and root command execution via a malicious RPM file or cron job injection.

Description

An unvalidated software update vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow a man-in-the-middle attacker to tamper with an update file and inject their own.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Core Security · textwebappsjsp
https://www.exploit-db.com/exploits/44166

This exploit demonstrates a man-in-the-middle attack against Trend Micro Email Encryption Gateway's insecure update mechanism, allowing arbitrary file writes and root command execution via a malicious RPM file or cron job injection.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Trend Micro Email Encryption Gateway 5.5 (Build 1111.00)
No auth needed
Prerequisites: Man-in-the-middle position · Victim system initiating an update check
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/44166/
Patch, Vendor Advisory x_refsource_confirm
https://success.trendmicro.com/solution/1119349
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://www.coresecurity.com/advisories/trend-micro-email-encryption-gateway-multiple-vulnerabilities

Scores

CVSS v3 8.1
EPSS 0.0644
EPSS Percentile 92.8%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-295
Status published
Products (1)
trendmicro/email_encryption_gateway 5.5
Published Mar 15, 2018
Tracked Since Feb 18, 2026