How severe is CVE-2021-27328?

CVE-2021-27328 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-27328 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27328?

CVE-2021-27328 affects Yeastar Neogate Tg400 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27328?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27328 published?

CVE-2021-27328 was published on 2021-02-19 and last updated on 2026-07-09.

CVE-2021-27328

CVE-2021-27328 is a medium-severity vulnerability in Yeastar Neogate Tg400 Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 6% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Yeastar Neogate Tg400 Firmware
Published: 2021-02-19
Last modified: 2026-07-09

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.

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 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-27328 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27328?: CVE-2021-27328 affects Yeastar Neogate Tg400 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27328?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27328 published?: CVE-2021-27328 was published on 2021-02-19 and last updated on 2026-07-09.

References

Affected products (1)

cpe:2.3:o:yeastar:neogate_tg400_firmware:91.3.0.3:*:*:*:*:*:*:*

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