How severe is CVE-2021-28150?

CVE-2021-28150 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-28150 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28150?

CVE-2021-28150 affects Hongdian H8922 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28150?

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

When was CVE-2021-28150 published?

CVE-2021-28150 was published on 2021-05-06 and last updated on 2026-06-17.

CVE-2021-28150

CVE-2021-28150 is a medium-severity vulnerability in Hongdian H8922 Firmware with a CVSS 3.x base score of 5.5. 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-425.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-425
Affected product: Hongdian H8922 Firmware
Published: 2021-05-06
Last modified: 2026-06-17

Description

Hongdian H8922 3.0.5 devices allow the unprivileged guest user to read cli.conf (with the administrator password and other sensitive data) via /backup2.cgi.

Frequently asked questions

What is CVE-2021-28150?: Hongdian H8922 3.0.5 devices allow the unprivileged guest user to read cli.conf (with the administrator password and other sensitive data) via /backup2.cgi.
How severe is CVE-2021-28150?: CVE-2021-28150 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-28150 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28150?: CVE-2021-28150 affects Hongdian H8922 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28150?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28150 published?: CVE-2021-28150 was published on 2021-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:hongdian:h8922_firmware:3.0.5:*:*:*:*:*:*:*

More vulnerabilities in Hongdian H8922 Firmware

CVE-2021-28152 — Critical (CVSS 9.8): Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the…
CVE-2021-28151 — High (CVSS 8.8): Hongdian H8922 3.0.5 devices allow OS command injection via shell metacharacters into the ip-address (aka Destination)…
CVE-2021-28149 — Medium (CVSS 6.5): Hongdian H8922 3.0.5 devices allow Directory Traversal. The /log_download.cgi log export handler does not validate user…

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