AUGUST 4, 2026
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Case File

CVE-2021-20556

MEDIUM · CVSS 5.3 EPSS 0.46%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2024-05-03 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.3. It may be remotely exploitable.

CVE
CVE-2021-20556
Severity
MEDIUM
CVSS
5.3
EPSS
0.46%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)