What is CVE-2021-3798?

CVE-2021-3798 is a medium-severity vulnerability in Opencryptoki Project, classified under Information Disclosure. CVSS score: 5.5/10. Published 2022-08-23.

How severe is CVE-2021-3798?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Information disclosure in Opencryptoki Project

CVE-2021-3798

A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. This may allow a malicious user to extract the private key by performing an invalid curve attack.

Vulnerability class: Information Disclosure

Published 2022-08-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Opencryptoki Project
Opencryptoki — versions Fixed in v3.17.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
access.redhat.com/security/cve/CVE-2021-3798 (Third Party Advisory)
github.com/opencryptoki/opencryptoki/pull/402 (Patch, Third Party Advisory)
github.com/opencryptoki/opencryptoki/commit/4e3b43c3d8844402c04a66b55c6c940f965… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3798?: CVE-2021-3798 is a medium-severity vulnerability in Opencryptoki Project, classified under Information Disclosure. CVSS score: 5.5/10. Published 2022-08-23.
How severe is CVE-2021-3798?: Medium severity. CVSS v3 base score is 5.5 out of 10.