What is CVE-2021-29861?

CVE-2021-29861 is a medium-severity vulnerability in IBM Aix. CVSS score: 6.2/10. Published 2021-11-17.

How severe is CVE-2021-29861?

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

Vulnerability in IBM Aix

CVE-2021-29861

IBM AIX 7.1, 7.2, and VIOS 3.1 could allow a non-privileged local user to exploit a vulnerability in EFS to expose sensitive information. IBM X-Force ID: 206085.

Published 2021-11-17 · 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: 0.003 (16.8th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.8% 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 Aix — versions 7.1.0, 7.2, 7.2.0
IBM Vios — versions 3.1.0, 3.1

References

www.ibm.com/support/pages/node/6516786 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/206085 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-29861?: CVE-2021-29861 is a medium-severity vulnerability in IBM Aix. CVSS score: 6.2/10. Published 2021-11-17.
How severe is CVE-2021-29861?: Medium severity. CVSS v3 base score is 6.2 out of 10.