CVE-2020-28188

CRITICAL EXPLOITED IN THE WILD RANSOMWARE NUCLEI

TerraMaster TOS <= 4.2.06 - Unauthenticated Remote Code Execution via Event Parameter

Title source: llm

Exploitation Summary

CVE-2020-28188 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io), including in ransomware campaigns. EIP tracks 1 public exploit, including a Metasploit module exploits/linux/http/terramaster_unauth_rce_cve_2020_35665. A Nuclei detection template is also available.

AI-analyzed exploit summary This Metasploit module exploits an unauthenticated RCE vulnerability in TerraMaster TOS via shell metacharacter injection in the Event parameter of the makecvs.php endpoint. It uploads a webshell and executes commands or payloads under the web application's privileges.

Description

Remote Command Execution (RCE) vulnerability in TerraMaster TOS <= 4.2.06 allow remote unauthenticated attackers to inject OS commands via /include/makecvs.php in Event parameter.

Exploits (1)

metasploit WORKING POC EXCELLENT

rubypocphp

https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/terramaster_unauth_rce_cve_2020_35665.rb

View Code ZIP pw:eip

This Metasploit module exploits an unauthenticated RCE vulnerability in TerraMaster TOS via shell metacharacter injection in the Event parameter of the makecvs.php endpoint. It uploads a webshell and executes commands or payloads under the web application's privileges.

Classification

Working Poc 100%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: TerraMaster TOS <= 4.2.06

No auth needed

Prerequisites: Network access to the target's web interface (port 8181 by default) · Vulnerable TerraMaster TOS version

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1203 - Exploitation for Client Execution

devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

TerraMaster TOS - Unauthenticated Remote Command Execution

CRITICALby gy741

FOFA: "terramaster" && header="tos"

References (4)

Core 4

Core References

Exploit, Third Party Advisory

https://research.checkpoint.com/2021/freakout-leveraging-newest-vulnerabilities-for-creating-a-botnet/

Exploit, Third Party Advisory

https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/

Vendor Advisory

https://www.terra-master.com/

Exploit, Third Party Advisory

http://packetstormsecurity.com/files/172880/TerraMaster-TOS-4.2.06-Remote-Code-Execution.html

Scores

CVSS v3 9.8

EPSS 0.9660

EPSS Percentile 99.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

VulnCheck KEV 2021-01-19

InTheWild.io 2021-09-30

Ransomware Use Confirmed

CWE

CWE-78

Status published

Products (1)

terra-master/tos < 4.2.06

Published Dec 24, 2020

Tracked Since Feb 18, 2026