Vulnerability Details : CVE-2021-20556
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.
Products affected by CVE-2021-20556
- cpe:2.3:a:ibm:cognos_controller:10.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:ibm:cognos_controller:10.4.2:*:*:*:*:*:*:*
- cpe:2.3:a:ibm:cognos_controller:11.0.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20556
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 18 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20556
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
NIST | 2025-01-07 |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
IBM Corporation | 2024-05-03 |
CWE ids for CVE-2021-20556
-
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.Assigned by: nvd@nist.gov (Primary)
-
The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.Assigned by: psirt@us.ibm.com (Secondary)
References for CVE-2021-20556
-
https://www.ibm.com/support/pages/node/7149876
Security Bulletin: IBM Controller has addressed multiple vulnerabilitiesVendor Advisory
-
https://exchange.xforce.ibmcloud.com/vulnerabilities/199181
Vulnerability ReportVendor Advisory
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