What is CVE-2021-39056?

CVE-2021-39056 is a medium-severity vulnerability in IBM I. CVSS score: 6.5/10. Published 2022-01-13.

How severe is CVE-2021-39056?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in IBM I

CVE-2021-39056

The IBM i 7.1, 7.2, 7.3, and 7.4 Extended Dynamic Remote SQL server (EDRSQL) could allow a remote authenticated user to send a specially crafted request and cause a denial of service. IBM X-Force ID: 214537.

Published 2022-01-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

IBM I — versions 7.1, 7.2, 7.3

References

www.ibm.com/support/pages/node/6540294 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/214537 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39056?: CVE-2021-39056 is a medium-severity vulnerability in IBM I. CVSS score: 6.5/10. Published 2022-01-13.
How severe is CVE-2021-39056?: Medium severity. CVSS v3 base score is 6.5 out of 10.