CVE-2018-6223 — A missing authentication for appliance registration vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to manipulate the registration process of the product to reset configuration parameters

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CRITICAL

A missing authentication for appliance registration vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to manipulate the registration process of the product to reset configuration parameters

Published Mar 15, 2018

9.8

CRITICAL

CVSS 3.0

EPSS 10.01%

Description

A missing authentication for appliance registration vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to manipulate the registration process of the product to reset configuration parameters.

Affected products

Vendor Trend Micro Product Trend Micro Email Encryption Gateway Default
n/a
- Version
  5.5
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Trend Micro

Trend Micro Email Encryption Gateway

n/a

Version	Status	Constraints
5.5	affected	-

Remediation

No remediation recorded yet.

Metrics

10.01% 0.10012

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.10012

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (31 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	10.01% (0.10012)	95.48th	v5 (v2026.06.15)
Sep 22, 2026	10.01% (0.10012)	95.40th	v5 (v2026.06.15)
Sep 21, 2026	6.26% (0.06257)	93.33th	v5 (v2026.06.15)
Sep 6, 2026	10.01% (0.10012)	95.29th	v5 (v2026.06.15)
Sep 5, 2026	6.26% (0.06257)	93.18th	v5 (v2026.06.15)
Aug 30, 2026	10.01% (0.10012)	95.27th	v5 (v2026.06.15)
Aug 28, 2026	6.26% (0.06257)	93.14th	v5 (v2026.06.15)
Aug 24, 2026	10.01% (0.10012)	95.24th	v5 (v2026.06.15)
Aug 23, 2026	6.30% (0.06298)	93.15th	v5 (v2026.06.15)
Jun 15, 2026	10.56% (0.10565)	95.19th	v5 (v2026.06.15)
Nov 21, 2025	5.14% (0.05139)	89.41th	v4 (v2025.03.14)
Nov 18, 2025	10.04% (0.10037)	92.27th	v4 (v2025.03.14)
Mar 30, 2025	5.40% (0.05398)	89.15th	v4 (v2025.03.14)
Mar 29, 2025	7.19% (0.07186)	85.66th	v4 (v2025.03.14)
Mar 17, 2025	5.40% (0.05398)	89.41th	v4 (v2025.03.14)
Dec 12, 2024	0.67% (0.00672)	80.48th	v3 (v2023.03.01)
Jun 18, 2024	0.67% (0.00672)	79.88th	v3 (v2023.03.01)
Sep 15, 2023	0.95% (0.00951)	81.35th	v3 (v2023.03.01)
Aug 6, 2023	1.34% (0.01343)	84.36th	v3 (v2023.03.01)
May 2, 2023	1.00% (0.01003)	81.43th	v3 (v2023.03.01)
Apr 13, 2023	1.06% (0.01065)	81.99th	v3 (v2023.03.01)
Mar 9, 2023	0.75% (0.00753)	78.14th	v3 (v2023.03.01)
Mar 7, 2023	0.75% (0.00747)	78.01th	v3 (v2023.03.01)
Mar 6, 2023	0.95% (0.00954)	36.37th	v2 (v2022.01.01)
Sep 2, 2022	0.95% (0.00954)	34.50th	v2 (v2022.01.01)
Apr 1, 2022	0.95% (0.00954)	32.50th	v2 (v2022.01.01)
Feb 4, 2022	0.95% (0.00954)	16.28th	v2 (v2022.01.01)
Feb 3, 2022	3.63% (0.03630)	71.73th	v1
Jan 6, 2022	3.63% (0.03630)	71.48th	v1
Sep 1, 2021	3.63% (0.03630)	82.60th	v1
Apr 14, 2021	3.63% (0.03630)	0.00th	v1

Weaknesses (1)

CWE-306

Missing Authentication

References (3)

https://success.trendmicro.com/solution/1119349
x_refsource_CONFIRMPatchVendor Advisory
https://www.coresecurity.com/advisories/trend-micro-email-encryption-gateway-multiple-vulnerabilities
x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
https://www.exploit-db.com/exploits/44166/
exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry

Link	Providers	Tags
https://success.trendmicro.com/solution/1119349		x_refsource_CONFIRMPatchVendor Advisory
https://www.coresecurity.com/advisories/trend-micro-email-encryption-gateway-multiple-vulnerabilities		x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
https://www.exploit-db.com/exploits/44166/		exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry