CVE-2026-21827 (CVSS 3.1)

Description

HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper handling of request data they are not entitled to, caused by improper handling of request data.

Is your site exposed to CVE-2026-21827?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

3.1

LOW

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

EPSS — Exploit Prediction

0.0015

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-359 CWE-359

References

Other References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0130164

Frequently Asked Questions

What is CVE-2026-21827? +

HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper handling of request data they are not entitled to, caused by improper handling of request data. It has a CVSS v3.1 base score of 3.1 (LOW).

How severe is CVE-2026-21827? +

CVE-2026-21827 has a CVSS v3.1 score of 3.1 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0015, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-21827? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-15623

Exposure of Private Personal Information to an Unauthorized Actor, : Exposure of Sensitive System Information to an Unauthorized Control Sphere …

CVE-2025-53625

The DynamicPageList3 extension is a reporting tool for MediaWiki, listing category members and intersections with various formats and details. Several …

CVE-2025-5009

In Gemini iOS, when a user shared a snippet of a conversation, it would share the entire conversation via a …

CVE-2025-62362

gpp-burgerportaal is a Dutch government citizen portal application. In versions before 2.0.3, 3.0.2, and 4.0.1, the name and email address …

CVE-2025-66035

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions …

CVE-2025-13008

An information disclosure vulnerability in M-Files Server before versions 25.12.15491.7, 25.8 LTS SR3, 25.2 LTS SR3 and 24.8 LTS SR5 …

CVE-2026-21827