CVE-2020-4452Network attack vector

Sensitive-data decryption via weak cryptographic algorithms

Published Jun 29, 2020 · Updated Sep 16, 2024

Weak cryptography in IBM API Connect 2018.4.1.0 through 2018.4.1.11 allows remote attackers to decrypt highly sensitive information. IBM has not disclosed which algorithm, protocol, key material, or software component performs the weak cryptographic operation. Exploitation is unauthenticated over a network but requires high complexity, and the reported consequence is confidentiality loss without data modification or service interruption.

CVSS severity5.9
Medium
EPSS probability0.79%
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 API Connect 2018.4.1.0 through 2018.4.1.11 allows remote attackers to decrypt highly sensitive information. IBM has not disclosed which algorithm, protocol, key material, or software component performs the weak cryptographic operation. Exploitation is unauthenticated over a network but requires high complexity, and the reported consequence is confidentiality loss without data modification or service interruption.

The record

CVE
CVE-2020-4452
Published
Jun 29, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
API Connect
Classifications
CWE-327
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 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=2018.4.1.0
  2. Affected versionversion=2018.4.1.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · API Connectversion=2018.4.1.0; version=2018.4.1.11

Published CVSS scores

5.2IBMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
5.9IBMCVSS:3.0/AV:N/AC:H/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.

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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)
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.

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Technologies

Your stack

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Your stack

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