CVE-2021-20455

Name: CVE-2021-20455
Creator: NVD / NIST
Published: 2025-01-07T16:15:27.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.7/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2021-20455 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. IBM Cognos Controller 11.0.0 through 11.0.1 and IBM Controller 11.1.0 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

IBM Cognos Controller 11.0.0 through 11.0.1 and IBM Controller 11.1.0 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system.

Metrics

CVSS 3.1

3.7/10

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

EPSS Probability

0.46%

36.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-209

Affected Software

Vendor	Product	Versions
Ibm	Cognos Controller	>= 11.0.0, <= 11.0.1
Ibm	Controller	11.1.0

References

https://www.ibm.com/support/pages/node/7179163Vendor Advisory

Timeline

Published: Jan 7, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-20455?

How severe is CVE-2021-20455?

CVE-2021-20455 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20455?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20455?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST