What is CVE-2020-4466?

CVE-2020-4466 is a medium-severity vulnerability in IBM Mq For HPE Nonstop. CVSS score: 6.5/10. Published 2020-07-20.

How severe is CVE-2020-4466?

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

Vulnerability in IBM Mq For HPE Nonstop

CVE-2020-4466

IBM MQ for HPE NonStop 8.0.4 and 8.1.0 could allow a remote authenticated attacker could cause a denial of service due to an error within the Queue processing function. IBM X-Force ID: 181563.

Published 2020-07-20 · 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: 0.014 (71.6th percentile), scored 2026-11-03.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · 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/6250473 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/181563 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4466?: CVE-2020-4466 is a medium-severity vulnerability in IBM Mq For HPE Nonstop. CVSS score: 6.5/10. Published 2020-07-20.
How severe is CVE-2020-4466?: Medium severity. CVSS v3 base score is 6.5 out of 10.