CVE-2021-20556

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 could allow a remote user to enumerate usernames due to differentiating error messages on existing usernames. IBM X-Force ID: 199181.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-204CWE-203

Affected software

VendorProductVersions
IBMCognos Controller10.4.1, 10.4.2, 11.0.0
ibmcognos_controller10.4.1
ibmcognos_controller10.4.2
ibmcognos_controller11.0.0

References

Timeline

Published
May 3, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2021-20556: Medium severity, CVSS 5.3 | Vulnix