CVE-2026-18221IBM i is Affected By Improper Authorization and Authentication Vulnerabilities in DDM / DRDA [, ]

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to gain unauthorized access due to improper validation of client-supplied authentication parameters.

9.8 CRITICALEPSS 0.61%Not in KEVNVD: Analyzed

Last updated: 2026-09-08 19:40 UTC

OverviewCVSS details

9.8CRITICALCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Sep 4, 2026
Assigner: ibm

Affected

i (IBM)

Versions: 7.6 · 7.5

All affected versions →

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable no · Impact total

EPSS · FIRST, scored Nov 7

0.61%chance of exploitation in 30 days

Higher than 49.82% of CVEs

CVSS 3.1 · NVD

9.8Critical

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

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 3.1 · ibm (CNA)

8.1High

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

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1	HIGH	3.1ibm (CNA)	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CVE ID: CVE-2026-18221
Status: Analyzed
Assigner (CNA): ibm
Published: Sep 4, 2026
Last modified: 2026-09-08 19:40 UTC
Weaknesses: CWE-287 · Improper Authentication

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 09:48 UTC.