What is CVE-2020-4976?

CVE-2020-4976 is a medium-severity vulnerability in IBM Db2, classified under Incorrect Default Permissions. CVSS score: 4.4/10. Published 2021-03-11.

How severe is CVE-2020-4976?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in IBM Db2

CVE-2020-4976

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow a local user to read and write specific files due to weak file permissions. IBM X-Force ID: 192469.

Published 2021-03-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

IBM Db2 — versions 9.7, 10.1, 10.5
IBM Db2 For Linux, Unix And Windows — versions 10.5, 10.1, 9.7
Linux Kernel
Microsoft Windows
NetApp Oncommand Insight

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

www.ibm.com/support/pages/node/6427859 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/192469 (VDB Entry, vdb-entry, Vendor Advisory)
security.netapp.com/advisory/ntap-20210409-0003/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-4976?: CVE-2020-4976 is a medium-severity vulnerability in IBM Db2, classified under Incorrect Default Permissions. CVSS score: 4.4/10. Published 2021-03-11.
How severe is CVE-2020-4976?: Medium severity. CVSS v3 base score is 4.4 out of 10.