What is CVE-2023-40371?

CVE-2023-40371 is a medium-severity vulnerability in IBM Aix, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 6.2/10. Published 2023-08-24.

How severe is CVE-2023-40371?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in IBM Aix

CVE-2023-40371

IBM AIX 7.2, 7.3, VIOS 3.1's OpenSSH implementation could allow a non-privileged local user to access files outside of those allowed due to improper access controls. IBM X-Force ID: 263476.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2023-08-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

IBM Aix — versions 7.2, 7.3, VIOS 3.1, 7.2, 7.3
IBM Vios — versions 3.1

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

www.ibm.com/support/pages/node/7028420 (vendor-advisory, Mitigation, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/263476 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2023-40371?: CVE-2023-40371 is a medium-severity vulnerability in IBM Aix, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 6.2/10. Published 2023-08-24.
How severe is CVE-2023-40371?: Medium severity. CVSS v3 base score is 6.2 out of 10.