How severe is CVE-2021-45842?

CVE-2021-45842 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-45842 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45842?

CVE-2021-45842 affects Terra-master Tos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45842?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-45842 published?

CVE-2021-45842 was published on 2022-04-25 and last updated on 2026-06-17.

CVE-2021-45842

CVE-2021-45842 is a high-severity vulnerability in Terra-master Tos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Terra-master Tos
Published: 2022-04-25
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-45842?: It is possible to obtain the first administrator's hash set up in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) on the system as well as other information such as MAC address, internal IP address etc. by performing a request to the /module/api.php?mobile/wapNasIPS endpoint.
How severe is CVE-2021-45842?: CVE-2021-45842 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-45842 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45842?: CVE-2021-45842 affects Terra-master Tos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45842?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-45842 published?: CVE-2021-45842 was published on 2022-04-25 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:terra-master:tos:4.2.15-2107141517:*:*:*:*:*:*:*

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CVE-2021-45836 — High (CVSS 8.8): An authenticated attacker can execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X…

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