CVE-2026-18221

criticalpriority · track · 39EPSS 0.006 · 49 %ileDEUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.62% (49th) EPSS
CVSS 9.8 · critical
Is it mine?
8 products
Check your exposure
Who says so?
2 sources
cert_bund · nvd

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · psirt@us.ibm.com USexploitability 2.2 · impact 5.9
v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287US
03

affected products (8)

Products and version ranges known to be affected.

04

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3172IBM i: Mehrere SchwachstellenDeutsch2026-09-02csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in IBM i ausnutzen, um einen Denial of Service zu verursachen, Sicherheitsmaßnahmen zu umgehen und um Datenbanktransaktionen oder Speicher zu manipulieren.

05

sources

Which sources assert this record, and when.

cert_bundnvdNVDCVE.orgMITRE
published 2026-09-04modified 2026-09-08
06

references (1) nvd

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan