What is CVE-2021-39034?

CVE-2021-39034 is a high-severity vulnerability in IBM Mq. CVSS score: 7.5/10. Published 2022-02-17.

How severe is CVE-2021-39034?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in IBM Mq

CVE-2021-39034

IBM MQ 9.1 LTS is vulnerable to a denial of service attack caused by an issue within the channel process. IBM X-Force ID: 213964.

Published 2022-02-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.4th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

IBM Mq — versions 9.1.0
Oracle Solaris

References

www.ibm.com/support/pages/node/6556466 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/213964 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39034?: CVE-2021-39034 is a high-severity vulnerability in IBM Mq. CVSS score: 7.5/10. Published 2022-02-17.
How severe is CVE-2021-39034?: High severity. CVSS v3 base score is 7.5 out of 10.