CVE-2020-4266

Code execution via crafted ANB file loading

Published May 14, 2020 · Updated Sep 16, 2024

Memory corruption in IBM i2 Analyst's Notebook 9.2.1 allows local users to execute arbitrary code after a victim opens a crafted .anb file. The .anb file-loading path mishandles attacker-controlled file data and corrupts memory; IBM has not disclosed the responsible parser or operation. Exploitation requires user interaction, and successful code runs with the victim's privileges.

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 after a victim opens a crafted .anb file. The .anb file-loading path mishandles attacker-controlled file data and corrupts memory; IBM has not disclosed the responsible parser or operation. Exploitation requires user interaction, and successful code runs with the victim's privileges.

The record

CVE
CVE-2020-4266
Published
May 14, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
i2 Analyst's Notebook
Classifications
CWE-787, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2020CVE 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=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

6.9NIST NVDAV:L/AC:M/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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