CVE-2021-45841 json
In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address…
published 2022-04-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32559
- cvss
- 8.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 8.4%
- EPSS 8.4% chance of exploitation in 30 days, percentile 95%
- public exploits
- 1
- Metasploit
Summary
In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.
Timeline
- First public exploit (Metasploit exploit/linux/http/terramaster_unauth_rce_cve_2021_45837)
- Published
Exploit prediction
8.42% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/linux/http/terramaster_unauth_rce_cve_2021_45837 TerraMaster TOS 4.2.15 or lower - RCE chain from unauthenticated to root via session crafting. metasploit exploit, excellent rank, 2021-12-24
- thatsn0tmy.site https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Classification
References
Sources
- CVE List CVE-2021-45841
- NVD CVE-2021-45841
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