CVE-2021-45839

MEDIUM

Terramaster F4-210,F2-210 TOS 4.2.X - Info Disclosure

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-45839. Includes Metasploit module exploits/linux/http/terramaster_unauth_rce_cve_2021_45837.

AI-analyzed exploit summary This Metasploit module exploits a chain of vulnerabilities (CVE-2021-45837, CVE-2021-45839, CVE-2021-45841) in TerraMaster TOS 4.2.15 or lower to achieve unauthenticated remote code execution as root. It crafts a session by leaking admin credentials and MAC address, then executes arbitrary commands via a vulnerable endpoint.

Description

It is possible to obtain the first administrator's hash set up on the system in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) as well as other information such as MAC address, internal IP address etc. by performing a request to the /module/api.php?mobile/webNasIPS endpoint.

Exploits (1)

metasploit WORKING POC EXCELLENT

rubypocunix

https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/terramaster_unauth_rce_cve_2021_45837.rb

View Code ZIP pw:eip

This Metasploit module exploits a chain of vulnerabilities (CVE-2021-45837, CVE-2021-45839, CVE-2021-45841) in TerraMaster TOS 4.2.15 or lower to achieve unauthenticated remote code execution as root. It crafts a session by leaking admin credentials and MAC address, then executes arbitrary commands via a vulnerable endpoint.

Classification

Working Poc 100%

Attack Type

Rce

Complexity

Complex

Reliability

Reliable

Target: TerraMaster TOS <= 4.2.15

No auth needed

Prerequisites: Network access to the target device · TerraMaster TOS version <= 4.2.15

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1068 - Exploitation for Privilege Escalation T1059 - Command and Scripting Interpreter

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

References (2)

Core 2

Core References

Exploit, Third Party Advisory

https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/

Exploit, Third Party Advisory

http://packetstormsecurity.com/files/172881/TerraMaster-TOS-4.2.15-Remote-Code-Execution.html

Scores

CVSS v3 6.5

EPSS 0.0945

EPSS Percentile 94.8%

Attack Vector NETWORK

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

Details

Status published

Products (1)

terra-master/tos 4.2.15-2107141517

Published Apr 25, 2022

Tracked Since Feb 18, 2026