IBM AIX 7.1, 7.2, and VIOS 3.1 could allow a local user that is in the with elevated group privileges to cause a denial of service due to a…

published 2021-06-28 5y ago modified 2026-06-17 4mo ago also EUVD-2021-16167

cvss: 4.9; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

IBM AIX 7.1, 7.2, and VIOS 3.1 could allow a local user that is in the with elevated group privileges to cause a denial of service due to a vulnerability in the lpd daemon. IBM X-Force ID: 200255.

Patch / fix

links 1

ibm.com/support/pages/node/6467129 advisory

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Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.9	CVSS:3.0/AC:L/A:H/I:N/PR:H/AV:N/UI:N/S:U/C:N/RC:C/RL:O/E:U
NVD	3.1	4.4	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA	3.0	4.9	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:N/I:N/A:P

Affected products

IBM VIOS
IBM AIX

References

ibm.com /support/pages/node/6467129
patch, vendor-advisory
exchange.xforce.ibmcloud.com /vulnerabilities/200255
vdb-entry, vendor-advisory

Sources

CVE List CVE-2021-29693
NVD CVE-2021-29693

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