1. Home
  2. CVE Database
  3. CVE-2026-18020
MEDIUM · 5.3

CVE-2026-18020

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to an off-by-one error in bounds checking.

Vulnerability Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to an off-by-one error in bounds checking.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW

Affected Products

VendorProductVersions
IbmI7.3

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2026-18020?

CVE-2026-18020 is a vulnerability with a CVSS score of 5.3 (MEDIUM). IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to an off-by-one error in bounds checking.

How severe is CVE-2026-18020?

CVE-2026-18020 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18020?

Check the references section above for vendor advisories and patch information. Affected products include: Ibm I.