EUVD-2026-83295
GHSA-mr8w-j3pv-4wm8
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Adjacent unauthenticated pre-auth FTP command handling yields AV:A/PR:N/AC:L; impact is pure availability loss so A:L with C:N and I:N (no integrity change in a DoS).
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to improper validation of FTP authentication commands.
AnalysisAI
Denial of service in IBM i 7.3, 7.4, 7.5, and 7.6 allows unauthenticated attackers on an adjacent network segment to disrupt the integrated FTP server by sending authentication commands that are not properly validated. Because the assessed vector is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L, the credential-free USER/PASS handshake is the likely trigger path, but realistic exposure is confined to LAN or same-broadcast-segment reachability rather than arbitrary internet access, and there is no confidentiality exposure or code execution evidenced. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires network reachability to the IBM i FTP server; the flaw is triggered by improperly validated FTP authentication commands, so it is exercised during the pre-login USER/PASS handshake without valid credentials (PR:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a moderate-severity, low-real-world-priority issue. … 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: IBM has published a fix for this issue at https://www.ibm.com/support/pages/node/7287873, and the appropriate PTF level for IBM i 7.3, 7.4, 7.5, or 7.6 should be applied after confirming the exact cumulative/group PTF requirement in that bulletin, since the advisory - not this analysis - is the source of the exact fix identifiers. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-78 – OS Command Injection
View allSame technique Denial Of Service
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External POC / Exploit Code
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