# CVE-2026-16821

## Summary

- **CVE ID:** CVE-2026-16821
- **Severity:** HIGH
- **CVSS Score:** 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-134
- **Published:** Aug 28, 2026
- **Last Modified:** Sep 1, 2026

## Description

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.

## Affected Products

- IBM — AIX (7.2)
- IBM — AIX (7.3)
- IBM — PowerVM VIOS (4.1)

## References

- [CNA](https://www.ibm.com/support/pages/node/7283858)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._