CVE-2026-16821

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to gain elevated privileges due to a format string vulnerability.

CVSS v3.1

7 HIGH

EPSS

0.10%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityHIGH

Privileges RequiredLOW

User InteractionNONE

ScopeUNCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityHIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Connections

3 relationships

Timeline

disclosure → media coverage

Aug 28, 2026

Disclosure — published as a CVE record. · last revised by NVD Sep 2, 2026