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ExploitedNot in CISA KEV yetFix available

CVE-2020-15568

Exploitation confirmed. First attested on 2023-10-14 by GCVE · kevintel, GCVE · shadowserver.

  • Published2021-01-30
  • Fixed in4.1.29
  • WeaknessCWE-913

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

TerraMaster TOS before 4.1.29 has Invalid Parameter Checking that leads to code injection as root. This is a dynamic class method invocation vulnerability in include/exportUser.php, in which an attacker can trigger a call to the exec method with (for example) OS commands in the opt parameter.

Timeline

dates in UTC
  1. 2021-01-3005:15CVE publishedNVD
  2. 2023-10-1415:54Listed as exploited by GCVEGCVE
  3. 2023-10-1415:54Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-15568?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-15568?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Terra-master tos
BranchAffectedFixed in
4.1< 4.1.294.1.29

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Terra-master tos to 4.1.29

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifiedn0bugz/CVE-2020-15568divinepwner/TerraMaster-TOS-CVE-2020-15568
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-01-30
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-15568?

TerraMaster TOS before 4.1.29 has Invalid Parameter Checking that leads to code injection as root. This is a dynamic class method invocation vulnerability in include/exportUser.php, in which an attacker can trigger a call to the exec method with (for example) OS commands in the opt parameter.

Is CVE-2020-15568 actively exploited?

Active exploitation of CVE-2020-15568 has not been confirmed. Its EPSS score was 29.0% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-15568?

CVE-2020-15568 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record