How severe is CVE-2018-6220?

CVE-2018-6220 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6220?

CVE-2018-6220 affects Trendmicro Email Encryption Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6220?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-6220 published?

CVE-2018-6220 was published on 2018-03-15 and last updated on 2026-06-17.

CVE-2018-6220

CVE-2018-6220 is a critical-severity vulnerability in Trendmicro Email Encryption Gateway with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Trendmicro Email Encryption Gateway
Published: 2018-03-15
Last modified: 2026-06-17

Description

An arbitrary file write vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to inject arbitrary data, which may lead to gaining code execution on vulnerable systems.

Frequently asked questions

What is CVE-2018-6220?: An arbitrary file write vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to inject arbitrary data, which may lead to gaining code execution on vulnerable systems.
How severe is CVE-2018-6220?: CVE-2018-6220 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6220?: CVE-2018-6220 affects Trendmicro Email Encryption Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-6220 published?: CVE-2018-6220 was published on 2018-03-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:trendmicro:email_encryption_gateway:5.5:*:*:*:*:*:*:*

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