CVE-2024-51464Public exploitNetwork attack vector

Authenticated operation bypass via weak MN token validation

Published Dec 21, 2024 · Updated Nov 3, 2025

Authentication bypass in IBM operating system releases 7.3, 7.4, and 7.5 allows remote authenticated users to perform unauthorized Navigator operations. Navigator's doFilter check accepts tampered MN security tokens when final digits are incremented or replaced with zeros rather than rejecting the modified value. A valid Navigator session and associated 19-digit MN token are required, and the bypass grants operations blocked for the account.

CVSS severity4.3
Medium
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in IBM operating system releases 7.3, 7.4, and 7.5 allows remote authenticated users to perform unauthorized Navigator operations. Navigator's doFilter check accepts tampered MN security tokens when final digits are incremented or replaced with zeros rather than rejecting the modified value. A valid Navigator session and associated 19-digit MN token are required, and the bypass grants operations blocked for the account.

The record

CVE
CVE-2024-51464
Published
Dec 21, 2024
Updated
Nov 3, 2025
Vendor
IBM
Product
IBM i
Classifications
CWE-288, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.3, 7.4, 7.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM iversion=7.3, 7.4, 7.5

Published CVSS scores

4.3IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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