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CRITICAL SECURITY BULLETIN: Trend Micro ServerProtect Authentication Bypass Vulnerability

    • Updated:
    • 24 Sep 2021
    • Product/Version:
    • ServerProtect 5.8
    • ServerProtect For EMC Celerra 5.8
    • ServerProtect for Network Appliance Filer 5.8
    • ServerProtect For Storage 6.0
    • Platform:
Release Date: September 24, 2021
CVE Identifier(s): CVE-2021-36745
Platform(s): Multiple
CVSS 3.0 Score(s): 9.8
Severity Rating(s): Critical

Trend Micro has released new Critical Patches (CPs) for Trend Micro ServerProtect. These patches resolve a critical authentication bypass vulnerability.


Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
ServerProtect for Storage (SPFS)6.0WindowsEnglish
ServerProtect for EMC Celerra (SPEMC)5.8EMC CelerraEnglish
ServerProtect for Network Appliance Filers (SPNAF)5.8NetAppEnglish
ServerProtect for Microsoft Windows / Novell Netware (SPNT)5.8WindowsEnglish


Trend Micro has released the following solutions to address the issue:

ProductUpdated versionNotesPlatformAvailability
SPFS6.0 CP1284ReadmeWindowsNow Available
SPEMC5.8 CP1577ReadmeEMC CelerraNow Available
SPNAF5.8 CP1299ReadmeNetAppNow Available
SPNT5.8 CP1575ReadmeWindowsNow Available

These are the minimum recommended version(s) of the patches and/or builds required to address the issue. Trend Micro highly encourages customers to obtain the latest version of the product if there is a newer one available than the one listed in this bulletin.

Customers are encouraged to visit Trend Micro’s Download Center to obtain prerequisite software (such as Service Packs) before applying any of the solutions above.

Vulnerability Details

CVE-2021-36745Authentication Bypass Vulnerability
CVSSv3: 9.8: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
A critical vulnerability in Trend Micro ServerProtect could allow a remote attacker to bypass authentication on affected installations.

Please note: no authentication is required in order to exploit this vulnerability.

Mitigating Factors

Exploiting these type of vulnerabilities generally require that an attacker has access (physical or remote) to a vulnerable machine. In addition to timely application of patches and updated solutions, customers are also advised to review remote access to critical systems and ensure policies and perimeter security is up-to-date.

However, even though an exploit may require several specific conditions to be met, Trend Micro strongly encourages customers to update to the latest builds as soon as possible.


Trend Micro would like to thank the following individuals for responsibly disclosing these issues and working with Trend Micro to help protect our customers:

External Reference(s)

The following advisories may be found at Trend Micro's Zero Day Initiative Published Advisories site:
  • ZDI-CAN-12771
Upgrade; Update
Solution Id:
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