CVE-2021-20539Network attack vector

Unauthenticated sensitive information disclosure

Published Aug 2, 2021 · Updated Sep 16, 2024

Information disclosure in IBM Cloud Pak for Security 1.5.0.0 through 1.7.1.0 allows remote attackers to read sensitive data via HTTP GET requests. IBM has not disclosed the affected HTTP endpoint, returned fields, or authorization check omitted during request processing. No credentials or user interaction are required, and the disclosed data can support further attacks, but no direct integrity or availability impact is reported.

CVSS severity5.3
Medium
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in IBM Cloud Pak for Security 1.5.0.0 through 1.7.1.0 allows remote attackers to read sensitive data via HTTP GET requests. IBM has not disclosed the affected HTTP endpoint, returned fields, or authorization check omitted during request processing. No credentials or user interaction are required, and the disclosed data can support further attacks, but no direct integrity or availability impact is reported.

The record

CVE
CVE-2021-20539
Published
Aug 2, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Cloud Pak for Security
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2021CVE 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=1.5.0.0
  2. Affected versionversion=1.5.0.1
  3. Affected versionversion=1.6.0.0
  4. Affected versionversion=1.6.0.1
  5. Affected versionversion=1.7.0.0
  6. Affected versionversion=1.7.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Cloud Pak for Securityversion=1.5.0.0; version=1.5.0.1; version=1.6.0.0; version=1.6.0.1; version=1.7.0.0; version=1.7.1.0

Published CVSS scores

4.6IBMCVSS:3.0/AC:L/AV:N/A:N/S:U/UI:N/C:L/I:N/PR:N/RL:O/RC:C/E:U
5.3IBMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/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

No sourced classifications are available.

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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