CVE-2020-4623

Local code execution via DLL search-order hijacking

Published Jul 26, 2021 · Updated Sep 16, 2024

DLL search-order hijacking in IBM i2 iBase 8.9.13 allows local users to execute arbitrary code through a crafted DLL. IBM has not identified the executable, load path, or missing DLL whose unsafe search order causes the crafted library to be loaded. Exploitation requires high local privileges and user interaction, and the loaded code runs in the affected application's security context.

CVSS severity7.7
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL search-order hijacking in IBM i2 iBase 8.9.13 allows local users to execute arbitrary code through a crafted DLL. IBM has not identified the executable, load path, or missing DLL whose unsafe search order causes the crafted library to be loaded. Exploitation requires high local privileges and user interaction, and the loaded code runs in the affected application's security context.

The record

CVE
CVE-2020-4623
Published
Jul 26, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
i2 iBase
Classifications
CWE-427, T1574.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=8.9.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

IBM · i2 iBaseversion=8.9.13

Published CVSS scores

6.5NISTCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
7.7IBMCVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.001Hijack Execution Flow: DLL Search Order Hijacking

Public exploit references

No public exploit references are available in this record.

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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