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CVE-2020-35665

86
FAUCET Score

CVE-2020-35665 is a critical unauthenticated command-execution vulnerability affecting TerraMaster TOS through version 4.2.06. This flaw allows an attacker to execute arbitrary commands on the system by injecting shell metacharacters into the "Event" parameter during CSV creation via the include/makecvs.php script. With a CVSS score of 9.8, the vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, a Metasploit module (EDB-49330) exists, indicating readily available exploit code, despite limited community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.06CPE matchmatch criteria
cpe:2.3:o:terra-master:terramaster_operating_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
78.14%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: TerraMaster TOS 4.2.06 or lower - Unauthenticated Remote Code Execution · Dec 12, 2020
ExploitDB: EDB-49330 · Dec 23, 2020
This CVE's current EPSS score of 0.7814 is in the 98th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/172880/TerraMaster-TOS-4.2.06-Remote-Code-Execution.html
exploit-db.com / exploits/49330
ExploitThird Party AdvisoryVDB Entry
pentest.com.tr / exploits/TerraMaster-TOS-4-2-06-Unauthenticated-Remote-Code-Execution.html
ExploitThird Party Advisory