CVE-2021-40088

Name: CVE-2021-40088
Creator: NVD / NIST
Published: 2021-08-25T02:15:08.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2021-40088 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS Probability

0.36%

27.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Primekey	Ejbca	< 7.6.0

References

https://support.primekey.com/news/posts/51Vendor Advisory
https://support.primekey.com/news/posts/51Vendor Advisory

Timeline

Published: Aug 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40088?

How severe is CVE-2021-40088?

CVE-2021-40088 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40088?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40088?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST