CVE-2020-4874Network attack vector

Sensitive information decryption via weak cryptography

Published May 3, 2024 · Updated Aug 4, 2024

Weak cryptography in IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 allows remote attackers to decrypt highly sensitive information. IBM has not disclosed the affected algorithm, protocol, key material, component, or operation that applies the weak primitive. Exploitation requires network access and high-complexity cryptanalysis, but no authentication or user interaction; confidentiality is the only reported impact.

CVSS severity5.9
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak cryptography in IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 allows remote attackers to decrypt highly sensitive information. IBM has not disclosed the affected algorithm, protocol, key material, component, or operation that applies the weak primitive. Exploitation requires network access and high-complexity cryptanalysis, but no authentication or user interaction; confidentiality is the only reported impact.

The record

CVE
CVE-2020-4874
Published
May 3, 2024
Updated
Aug 4, 2024
Vendor
IBM
Product
IBM Cognos Controller
Classifications
CWE-327
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=10.4.1, 10.4.2, 11.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Cognos Controllerversion=10.4.1, 10.4.2, 11.0.0

Published CVSS scores

5.9IBM CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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-327Use of a Broken or Risky Cryptographic Algorithm

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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