Is CVE-2021-40088 actively exploited?

No active exploitation of CVE-2021-40088 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40088 be exploited remotely?

Yes. CVE-2021-40088 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40088?

CVE-2021-40088 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2021-40088

CWE-862Published: August 25, 2021· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

An issue was discovered in PrimeKey EJBCA before 7.6.0. CMP RA Mode can be configured to use a known client certificate to authenticate enrolling clients. The same RA client certificate is used for revocation requests as well. While enrollment enforces multi tenancy constraints (by verifying that the client certificate has access to the CA and Profiles being enrolled against), this check was not performed when authenticating revocation operations, allowing a known tenant to revoke a certificate belonging to another tenant.

NVD Source

Technical Analysis

CVE-2021-40088 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.