What is CVE-2020-4200?

CVE-2020-4200 is a medium-severity vulnerability in IBM Aix. CVSS score: 6.5/10. Published 2020-02-19.

How severe is CVE-2020-4200?

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

Vulnerability in IBM Aix

CVE-2020-4200

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 10.5, 11.1, and 11.5 could allow an authenticated attacker to send specially crafted commands to cause a denial of service. IBM X-Force ID: 174914.

Published 2020-02-19 · 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: 0.016 (75.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

IBM Aix
IBM Db2 — versions 10.5, 11.1, 11.5
IBM Db2 For Linux- Unix And Windows — versions 10.5, 11.1, 11.5
Linux Kernel
Microsoft Windows

References

www.ibm.com/support/pages/node/2875251 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/174914 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4200?: CVE-2020-4200 is a medium-severity vulnerability in IBM Aix. CVSS score: 6.5/10. Published 2020-02-19.
How severe is CVE-2020-4200?: Medium severity. CVSS v3 base score is 6.5 out of 10.