CVE-2026-18077: CWE-787 Out-of-bounds Write
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to a stack-based buffer overflow.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-18077) affects IBM i operating system versions 7.3 through 7.6. It is a stack-based buffer overflow (CWE-787) that can be triggered remotely without authentication, leading to denial of service (application or system crash). The CVSS 3.1 base score is 7.5, reflecting high severity due to the ease of remote exploitation and the impact on availability. No information about patches or vendor advisories is currently available, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation results in denial of service by crashing the affected system or application. There is no impact on confidentiality or integrity according to the CVSS vector. The vulnerability can be exploited remotely without privileges or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor IBM's security advisories for updates. No temporary or official fixes are currently documented.
CVE-2026-18077: CWE-787 Out-of-bounds Write
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 a stack-based buffer overflow.
CVSS v3.1
Score 7.5high
Affected software
IBM
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
This vulnerability (CVE-2026-18077) affects IBM i operating system versions 7.3 through 7.6. It is a stack-based buffer overflow (CWE-787) that can be triggered remotely without authentication, leading to denial of service (application or system crash). The CVSS 3.1 base score is 7.5, reflecting high severity due to the ease of remote exploitation and the impact on availability. No information about patches or vendor advisories is currently available, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation results in denial of service by crashing the affected system or application. There is no impact on confidentiality or integrity according to the CVSS vector. The vulnerability can be exploited remotely without privileges or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor IBM's security advisories for updates. No temporary or official fixes are currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-28T15:12:51.754Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7e2fb3bf8831d539cb5cc6
Added to database: 08/13/2026, 20:57:23 UTC
Last enriched: 08/21/2026, 13:00:51 UTC
Last updated: 09/26/2026, 01:47:40 UTC
Views: 38
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