HOMEVULNERABILITIESCVE-2021-45839
MEDIUM

CVE-2021-45839

NVD-CWE-noinfoPublished: April 25, 2022· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-45839 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

terra-master3 product(s)
tosf2-210f4-210
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (4)

→
http://packetstormsecurity.com/files/172881/TerraMaster-TOS-4.2.15-Remote-Code-Execution.html
→
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
→
https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2021-45839
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedApr 25, 2022

Related CVEs (NVD-CWE-noinfo)

CVE-2012-5088
10.0
CVE-2012-1533
10.0
CVE-2008-5010
10.0
CVE-2015-6787
10.0
CVE-2006-3698
10.0
CVE-2010-0886
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45839 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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