Is CVE-2021-33895 actively exploited?

No active exploitation of CVE-2021-33895 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-33895 be exploited remotely?

Yes. CVE-2021-33895 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-33895?

CVE-2021-33895 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2021-33895

CWE-287Published: June 25, 2021· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

ETINET BACKBOX E4.09 and H4.09 mismanages password access control. When a user uses the User ID of the process running BBSV to login to the Backbox UI application, the system procedure (USER_AUTHENTICATE_) used for verifying the Password returns 0 (no error). The reason is that the user is not running the XYGate application. Hence, BBSV assumes the Password is correct. For H4.09, the affected version isT0954V04^AAO. For E4.09, the affected version is 22SEP2020. Note: If your current version is E4.10-16MAY2021 (version procedure T9999V04_16MAY2022_BPAKETI_10), a hotfix (FIXPAK-19OCT-2022) is available in version E4.10-19OCT2022. Resolution to CVE-2021-33895 in version E4.11-19OCT2022

NVD Source

Technical Analysis

CVE-2021-33895 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.