CVE-2020-4261

Arbitrary code execution via crafted .anb file

Published May 14, 2020 · Updated Sep 16, 2024

Memory corruption in IBM i2 Analyst’s Notebook 9.2.1 allows local attackers to execute arbitrary code by opening a specially crafted .anb file. The flaw occurs while the application loads malformed Analyst’s Notebook files and corrupts process memory; exploitation requires persuading a victim to open the file, after which code runs with the victim’s privileges and can affect confidentiality, integrity, and availability.

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 attackers to execute arbitrary code by opening a specially crafted .anb file. The flaw occurs while the application loads malformed Analyst’s Notebook files and corrupts process memory; exploitation requires persuading a victim to open the file, after which code runs with the victim’s privileges and can affect confidentiality, integrity, and availability.

The record

CVE
CVE-2020-4261
Published
May 14, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
i2 Analyst's Notebook
Classifications
T1203
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

6.8NVDCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
7.8IBMCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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