CVE-2021-27328

Name: CVE-2021-27328
Creator: NVD / NIST
Published: 2021-02-19T19:15:12.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 9.00%

Last modified Jun 17, 2026

CVE-2021-27328 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 9.00% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

9.00%

94.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Yeastar	Neogate Tg400 Firmware	91.3.0.3

References

http://packetstormsecurity.com/files/161560/Yeastar-TG400-GSM-Gateway-91.3.0.3-Path-Traversal.htmlExploit, Third Party Advisory, VDB Entry
http://yeastar.comVendor Advisory
https://github.com/SQSamir/CVE-2021-27328Exploit, Third Party Advisory
http://packetstormsecurity.com/files/161560/Yeastar-TG400-GSM-Gateway-91.3.0.3-Path-Traversal.htmlExploit, Third Party Advisory, VDB Entry
http://yeastar.comVendor Advisory
https://github.com/SQSamir/CVE-2021-27328Exploit, Third Party Advisory

Timeline

Published: Feb 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27328?

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.

How severe is CVE-2021-27328?

CVE-2021-27328 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 9.00% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27328?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27328?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST