EUVD-2026-63386
GHSA-83fg-6ff4-5q69
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Description supports remote unauthenticated file overwrite (AV:N/AC:L/PR:N/UI:N); overwrite yields high integrity and availability impact but no disclosure, so C:N.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to overwrite arbitrary files due to improper neutralization of special elements in input.
AnalysisAI
Arbitrary file overwrite in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 lets a remote attacker corrupt or replace files on the host due to improper neutralization of special elements in input (CWE-73). The CVSS 3.1 base score is 9.1 (I:H/A:H, no confidentiality impact), reflecting integrity and availability damage without data disclosure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVSS vector (AV:N/AC:L/PR:N/UI:N), no special conditions are stated - remote unauthenticated exploitation with low complexity and no user interaction against affected IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are largely aligned toward high priority: the CVSS vector (AV:N/AC:L/PR:N/UI:N) describes remote, low-complexity, unauthenticated exploitation, and the 9.1 score is driven by high integrity and availability impact. … 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 | Patch available per vendor advisory: apply the IBM-provided fix documented at https://www.ibm.com/support/pages/node/7283858 for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1 (the input does not specify an exact fix version, so obtain the precise APAR/interim fix or ifix level from that advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 and determine which have network-accessible management interfaces. …
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Same weakness CWE-73 – External Control of File Name or Path
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External POC / Exploit Code
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