CVE-2020-4257

Code execution via crafted-file memory corruption

Published May 14, 2020 · Updated Sep 17, 2024

Memory corruption in IBM i2 Analyst's Notebook 9.2.1 allows local users to execute arbitrary code by inducing a crafted file to be opened. IBM identifies .anb file loading as the affected operation but does not disclose the parser, memory operation, or precise corruption primitive. Exploitation requires a victim to open the file and executes code with the victim's privileges; related impact includes an application crash.

CVSS severity7.8
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in IBM i2 Analyst's Notebook 9.2.1 allows local users to execute arbitrary code by inducing a crafted file to be opened. IBM identifies .anb file loading as the affected operation but does not disclose the parser, memory operation, or precise corruption primitive. Exploitation requires a victim to open the file and executes code with the victim's privileges; related impact includes an application crash.

The record

CVE
CVE-2020-4257
Published
May 14, 2020
Updated
Sep 17, 2024
Vendor
IBM
Product
i2 Analyst's Notebook
Classifications
CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

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  1. Affected versionversion=9.2.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · i2 Analyst's Notebookversion=9.2.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.9NIST NVDAV:L/AC:M/Au:N/C:C/I:C/A:C
7.8IBM CorporationCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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