What is CVE-2020-4376?

CVE-2020-4376 is a medium-severity vulnerability in IBM Mq For HPE Nonstop. CVSS score: 6.5/10. Published 2020-07-01.

How severe is CVE-2020-4376?

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

Vulnerability in IBM Mq For HPE Nonstop

CVE-2020-4376

IBM MQ, IBM MQ Appliance, IBM MQ for HPE NonStop 8.0.4 and 8.1.0 could allow an attacker to cause a denial of service caused by an error within the pubsub logic. IBM X-Force ID: 179081.

Published 2020-07-01 · 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: 0.011 (64.4th percentile), scored 2026-11-03.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

IBM Mq For HPE Nonstop — versions 8.1.0, 8.0.4
IBM Mq For HPE Nonstop — versions 8.0.4, 8.1.0

References

www.ibm.com/support/pages/node/6242364 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/179081 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4376?: CVE-2020-4376 is a medium-severity vulnerability in IBM Mq For HPE Nonstop. CVSS score: 6.5/10. Published 2020-07-01.
How severe is CVE-2020-4376?: Medium severity. CVSS v3 base score is 6.5 out of 10.