What is CVE-2021-38986?

CVE-2021-38986 is a medium-severity vulnerability in IBM Mq, classified under Insufficient Session Expiration. CVSS score: 5.4/10. Published 2022-03-01.

How severe is CVE-2021-38986?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in IBM Mq

CVE-2021-38986

IBM MQ Appliance 9.2 CD and 9.2 LTS does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 212942.

Published 2022-03-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

IBM Mq
IBM Mq Appliance — versions 9.2 LTS, 9.2 CD

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

www.ibm.com/support/pages/node/6560032 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/212942 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-38986?: CVE-2021-38986 is a medium-severity vulnerability in IBM Mq, classified under Insufficient Session Expiration. CVSS score: 5.4/10. Published 2022-03-01.
How severe is CVE-2021-38986?: Medium severity. CVSS v3 base score is 5.4 out of 10.