Which products and versions are affected by CVE-2017-11391?

Affected: Interscan Messaging Security Virtual Appliance (Trendmicro) versions 9.0, 9.1; Trend Micro InterScan Messaging Security Virtual Appliance versions >= 9.0,9.1. The full list is in the CVE brief.

Is CVE-2017-11391 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2017-11391 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2017-11391?

Public exploit code is available.

Is there a fix for CVE-2017-11391?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2017-11391 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2017-11391

HighPublic exploit

Proxy command injection vulnerability in Trend Micro InterScan Messaging Virtual Appliance 9.0 and 9.1 allows remote attackers to execute arbitrary code on vulnerable installations.

Published Aug 3, 2017 · Updated May 12, 2026

Key Facts

Patch immediately

CVE-2017-11391 is a high-severity vulnerability (CVSS 8.8 v3) affecting Interscan Messaging Security Virtual Appliance (Trendmicro), Trend Micro InterScan Messaging Security Virtual Appliance.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 62% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3

8.8

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

62%

Higher than 99.1% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2017-11391 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Proxy command injection vulnerability in Trend Micro InterScan Messaging Virtual Appliance 9.0 and 9.1 allows remote attackers to execute arbitrary code on vulnerable installations. The specific flaw can be exploited by parsing the "t" parameter within modTMCSS Proxy. Formerly ZDI-CAN-4744.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
Interscan Messaging Security Virtual ApplianceTrendmicro	9.0, 9.1	n/a
Trend Micro InterScan Messaging Security Virtual Appliance	>= 9.0,9.1	n/a

Timeline

Publicly disclosed
Aug 3, 2017
Last updated
May 12, 2026

Weakness Type

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

References

advisoryhttps://success.trendmicro.com/solution/1117723
advisory100075
advisoryhttp://www.zerodayinitiative.com/advisories/ZDI-17-502
exploitMSF trendmicro_imsva_widget_exec.rb

FAQ

Common Questions.

Proxy command injection vulnerability in Trend Micro InterScan Messaging Virtual Appliance 9.0 and 9.1 allows remote attackers to execute arbitrary code on vulnerable installations.
Affected: Interscan Messaging Security Virtual Appliance (Trendmicro) versions 9.0, 9.1; Trend Micro InterScan Messaging Security Virtual Appliance versions >= 9.0,9.1. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2017-11391 Running On Your Attack Surface?

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