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CVE-2020-15568

57
FAUCET Score

CVE-2020-15568 is a critical code injection vulnerability affecting TerraMaster TOS versions prior to 4.1.29. It stems from invalid parameter checking in the include/exportUser.php file, allowing an unauthenticated attacker to execute arbitrary OS commands as root. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While not listed in KEV, it has high EPSS and FAUCET risk scores, and has been leveraged by the FreakOut botnet, indicating active exploitation and significant community and media attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.1.29CPE matchmatch criteria
cpe:2.3:o:terra-master:tos:*:*:*:*:*:*:*:*

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
28.49%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2020-15568 · Feb 10, 2021
This CVE's current EPSS score of 0.2849 is in the 95th 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

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

help.terra-master.com / TOS/view
ProductVendor Advisory
ssd-disclosure.com / ssd-advisory-terramaster-os-exportuser-php-remote-code-execution
ExploitThird Party Advisory