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Vulnerability record · CVE-2021-27328 · published 19 February 2021

CVE-2021-27328: Yeastar neogate tg400 firmware path traversal vulnerability

Yeastar · Neogate Tg400 Firmware

Yeastar NeoGate TG400 91.3.0.3 devices are affected by Directory Traversal. An authenticated user can decrypt firmware and can read sensitive information, such as a password or decryption key.

6.5 CVSS 3.1 Medium EPSS 6.4% · top 6.6% CWE-22 · Path traversal
6.5CVSS 3.1 base score, v2 4.0
6.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 4 tagged exploit
9 Jul 2026Last modified by NVD

Description

Yeastar NeoGate TG400 91.3.0.3 devices are affected by Directory Traversal. An authenticated user can decrypt firmware and can read sensitive information, such as a password or decryption key.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/161560/Yeastar-TG400-GSM-Gateway-91.3.0.3-Path-Traversal.html ExploitThird Party AdvisoryVDB Entry
https://github.com/SQSamir/CVE-2021-27328 ExploitThird Party Advisory
http://packetstormsecurity.com/files/161560/Yeastar-TG400-GSM-Gateway-91.3.0.3-Path-Traversal.html ExploitThird Party AdvisoryVDB Entry
https://github.com/SQSamir/CVE-2021-27328 ExploitThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-27328), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.