What is CVE-2018-1566?

CVE-2018-1566 is a high-severity vulnerability in IBM Db2, classified under Use of Externally-Controlled Format String. CVSS score: 8.4/10. Published 2018-07-10.

How severe is CVE-2018-1566?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in IBM Db2

CVE-2018-1566

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, and 11.1 could allow a local user to execute arbitrary code due to a format string error. IBM X-Force ID: 143023.

Published 2018-07-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.7th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% 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 Db2 — versions 9.7, 10.1, 10.5
IBM Db2 For Linux, Unix And Windows — versions 9.7, 10.5, 10.1
Linux Kernel
Microsoft Windows

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

www.securityfocus.com/bid/104740 (VDB Entry, Third Party Advisory, vdb-entry)
www.ibm.com/support/docview.wss (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/143023 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1041229 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-1566?: CVE-2018-1566 is a high-severity vulnerability in IBM Db2, classified under Use of Externally-Controlled Format String. CVSS score: 8.4/10. Published 2018-07-10.
How severe is CVE-2018-1566?: High severity. CVSS v3 base score is 8.4 out of 10.