EUVD-2026-71606
GHSA-phqr-rc26-gp39
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable heap overflow requiring low-privilege credentials; successful memory corruption enables full C/I/A impact on the IBM i system.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to corrupt memory due to an integer underflow.
AnalysisAI
Integer underflow leading to heap-based buffer overflow in IBM i 7.3 through 7.6 allows a remote attacker with low-privilege authenticated access to corrupt memory, potentially achieving arbitrary code execution or full system compromise. IBM has released patches for all four affected major versions; no active exploitation is recorded in CISA KEV and EPSS sits at 0.20% (10th percentile), placing real-world exploitation probability low despite the high CVSS score. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid IBM i user account with at minimum low-level privileges (PR:L per CVSS vector); unauthenticated exploitation is not supported by available data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) signals a high-severity, network-reachable vulnerability exploitable by any authenticated user. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the IBM-released PTF (Program Temporary Fix) appropriate to your IBM i release level as detailed in the IBM support advisory at https://www.ibm.com/support/pages/node/7286094; this is the primary remediation and the only vendor-confirmed fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all IBM i systems running versions 7.3, 7.4, 7.5, or 7.6 and classify by criticality. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today