Security readout for executives and security teams
This issue affects specific TerraMaster NAS devices running TOS 4.2.x. An attacker who has the device MAC address and a user's password hash may be able to create valid session cookies. If the guest account is enabled, the CVE says an unauthenticated attacker may log in as guest using an empty hash. Exposure is most likely where TerraMaster F4-210 or F2-210 NAS systems run TOS 4.2.x, especially 4.2.15-2107141517, and their TOS web interface is reachable by untrusted networks. Guest account enablement increases concern. Treat this as a high-priority NAS exposure issue where affected TerraMaster systems are internet-facing or guest access is enabled. Prioritize inventory, access restriction, and vendor update checks before broader remediation planning. Mitigation focus: Inventory TerraMaster F4-210 and F2-210 NAS devices and record TOS versions.; Check TerraMaster support guidance for fixed TOS releases or vendor mitigations.; Disable guest accounts unless there is a documented business need..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-45841 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/CVE reference
Products and packages named in the record
CWE details
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