How severe is CVE-2016-6266?

CVE-2016-6266 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-6266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6266?

CVE-2016-6266 primarily affects Trendmicro Smart Protection Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-6266?

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

When was CVE-2016-6266 published?

CVE-2016-6266 was published on 2017-01-30 and last updated on 2026-06-17.

CVE-2016-6266

CVE-2016-6266 is a high-severity vulnerability in Trendmicro Smart Protection Server with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Trendmicro Smart Protection Server
Published: 2017-01-30
Last modified: 2026-06-17

Description

ccca_ajaxhandler.php in Trend Micro Smart Protection Server 2.5 before build 2200, 2.6 before build 2106, and 3.0 before build 1330 allows remote authenticated users to execute arbitrary commands via shell metacharacters in the (1) host or (2) apikey parameter in a register action, (3) enable parameter in a save_stting action, or (4) host or (5) apikey parameter in a test_connection action.

Frequently asked questions

What is CVE-2016-6266?: ccca_ajaxhandler.php in Trend Micro Smart Protection Server 2.5 before build 2200, 2.6 before build 2106, and 3.0 before build 1330 allows remote authenticated users to execute arbitrary commands via shell metacharacters in the (1) host or (2) apikey parameter in a register action, (3) enable parameter in a save_stting action, or (4) host or (5) apikey parameter in a test_connection action.
How severe is CVE-2016-6266?: CVE-2016-6266 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-6266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6266?: CVE-2016-6266 primarily affects Trendmicro Smart Protection Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-6266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6266 published?: CVE-2016-6266 was published on 2017-01-30 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:trendmicro:smart_protection_server:2.5:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:smart_protection_server:2.6:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:smart_protection_server:3.0:*:*:*:*:*:*:*

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