CVE-2020-4877Network attack vector

Unauthorized modification via exposed public fields

Published Jan 21, 2022 · Updated Sep 17, 2024

Incorrect authorization in IBM Cognos Controller 10.4.0 through 10.4.2 allows remote attackers to make unauthorized modifications. The application uses public fields in public classes in a way that permits unauthorized changes; IBM has not identified the affected classes or fields. No authentication or user interaction is required, and the public record does not identify which data can be changed or the exact service effect.

CVSS severity7.3
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in IBM Cognos Controller 10.4.0 through 10.4.2 allows remote attackers to make unauthorized modifications. The application uses public fields in public classes in a way that permits unauthorized changes; IBM has not identified the affected classes or fields. No authentication or user interaction is required, and the public record does not identify which data can be changed or the exact service effect.

The record

CVE
CVE-2020-4877
Published
Jan 21, 2022
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Cognos Controller
Classifications
CWE-863, T1565
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2022CVE 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?

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

  1. Affected versionversion=10.4.0
  2. Affected versionversion=10.4.1
  3. Affected versionversion=10.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Cognos Controllerversion=10.4.0; version=10.4.1; version=10.4.2

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3IBM CorporationCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1565Data Manipulation

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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