Security readout for executives and security teams
CVE-2021-27328 affects Yeastar NeoGate TG400 firmware 91.3.0.3. An authenticated user may read sensitive files through directory traversal, potentially exposing passwords or decryption keys. This is mainly a risk where device administration access is weakly controlled. Likely limited to organizations running Yeastar NeoGate TG400 devices on firmware 91.3.0.3, especially where management access is exposed, shared, or poorly monitored. Treat as a targeted appliance exposure issue. Prioritize devices with internet-facing or broadly accessible administration, because credential or key disclosure can enable follow-on compromise. Mitigation focus: Inventory Yeastar NeoGate TG400 devices and confirm firmware versions.; Restrict management access to trusted networks, VPNs, or administrative jump hosts.; Review vendor guidance for fixed firmware or supported upgrade paths..
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
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Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-27328 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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Vulnerability timeline
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- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
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- CVE updatedCVE Program
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ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/SQSamir/CVE-2021-27328CVE reference, mitre
Products and packages named in the record
CWE details
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