CVE-2026-18671: CWE-190 Integer Overflow or Wraparound
IBM i versions 7.3, 7.4, 7.5, and 7.6 contain an integer overflow vulnerability in the NetServer component that can be triggered by an authenticated attacker. This overflow occurs during bounds checking in request processing and can cause a server thread exception, leading to a temporary denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 6.5.
AI Analysis
Technical Summary
CVE-2026-18671 is an integer overflow vulnerability (CWE-190) affecting IBM i versions 7.3 through 7.6. An authenticated attacker could exploit this flaw in the NetServer service by causing an integer overflow during bounds checking of incoming requests. This results in a server thread exception that can temporarily disrupt service availability, causing a denial of service. There is no indication of confidentiality or integrity impact. No official patch or remediation level has been published yet.
Potential Impact
The vulnerability allows an authenticated attacker to cause a temporary denial of service by triggering a server thread exception in the NetServer component. There is no evidence of data confidentiality or integrity compromise. The impact is limited to availability disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, monitor for unusual NetServer behavior and restrict access to authenticated users only. No official remediation or temporary fix has been published by IBM at this time.
CVE-2026-18671: CWE-190 Integer Overflow or Wraparound
Description
IBM i versions 7.3, 7.4, 7.5, and 7.6 contain an integer overflow vulnerability in the NetServer component that can be triggered by an authenticated attacker. This overflow occurs during bounds checking in request processing and can cause a server thread exception, leading to a temporary denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 6.5.
CVSS v3.1
Score 6.5medium
Affected software
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18671 is an integer overflow vulnerability (CWE-190) affecting IBM i versions 7.3 through 7.6. An authenticated attacker could exploit this flaw in the NetServer service by causing an integer overflow during bounds checking of incoming requests. This results in a server thread exception that can temporarily disrupt service availability, causing a denial of service. There is no indication of confidentiality or integrity impact. No official patch or remediation level has been published yet.
Potential Impact
The vulnerability allows an authenticated attacker to cause a temporary denial of service by triggering a server thread exception in the NetServer component. There is no evidence of data confidentiality or integrity compromise. The impact is limited to availability disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, monitor for unusual NetServer behavior and restrict access to authenticated users only. No official remediation or temporary fix has been published by IBM at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-03T15:15:04.146Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7e2fb3bf8831d539cb5cdb
Added to database: 08/13/2026, 20:57:23 UTC
Last enriched: 08/13/2026, 21:12:07 UTC
Last updated: 08/13/2026, 21:53:22 UTC
Views: 4
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