How severe is CVE-2021-39433?

CVE-2021-39433 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-39433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39433?

CVE-2021-39433 affects Biqs Biqsdrive. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39433?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-39433 published?

CVE-2021-39433 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2021-39433

CVE-2021-39433 is a high-severity vulnerability in Biqs Biqsdrive with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Biqs Biqsdrive
Published: 2021-10-04
Last modified: 2026-06-17

Description

A local file inclusion (LFI) vulnerability exists in version BIQS IT Biqs-drive v1.83 and below when sending a specific payload as the file parameter to download/index.php. This allows the attacker to read arbitrary files from the server with the permissions of the configured web-user.

Frequently asked questions

What is CVE-2021-39433?: A local file inclusion (LFI) vulnerability exists in version BIQS IT Biqs-drive v1.83 and below when sending a specific payload as the file parameter to download/index.php. This allows the attacker to read arbitrary files from the server with the permissions of the configured web-user.
How severe is CVE-2021-39433?: CVE-2021-39433 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-39433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39433?: CVE-2021-39433 affects Biqs Biqsdrive. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39433?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-39433 published?: CVE-2021-39433 was published on 2021-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:biqs:biqsdrive:*:*:*:*:*:*:*:*