What is CVE-2023-43018?

CVE-2023-43018 is a medium-severity vulnerability in IBM Cics Tx, classified under CWE-250. CVSS score: 5.9/10. Published 2023-11-03.

How severe is CVE-2023-43018?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Privilege escalation in IBM Cics Tx

CVE-2023-43018

IBM CICS TX Standard 11.1 and Advanced 10.1, 11.1 performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses. IBM X-Force ID: 266163.

Published 2023-11-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (38.0th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Cics Tx — versions 10.1, 11.1
IBM Cics Tx Advanced — versions 10.1, 11.1
IBM Cics Tx Standard — versions 11.1
Linux Kernel

Weakness classification (CWE)

References

exchange.xforce.ibmcloud.com/vulnerabilities/266163 (VDB Entry, vdb-entry, Vendor Advisory)
www.ibm.com/support/pages/node/7063668 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-43018?: CVE-2023-43018 is a medium-severity vulnerability in IBM Cics Tx, classified under CWE-250. CVSS score: 5.9/10. Published 2023-11-03.
How severe is CVE-2023-43018?: Medium severity. CVSS v3 base score is 5.9 out of 10.