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Connections CVE-2026-56537

| EUVDEUVD-2026-49182 LOW
Error Message Information Leak (CWE-209)
2026-07-27 HCL GHSA-cg5p-v66j-3vjx
3.5
CVSS 3.1 · Vendor: HCL
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Error message sanitization
MITRE ATT&CK

1 technique across 1 tactic: Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Low-severity information disclosure in HCL Connections allows authenticated users with low privileges to obtain sensitive information they are not entitled to, caused by improper error handling. Exploitation requires user interaction and does not affect integrity or availability. No active exploitation or public exploit code has been reported.

Affected VersionsENISA

Connections 8.0

Affected Packages

euvd connections no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (HCL) PRIMARY 3.5 LOW
AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Primary rating from Vendor (HCL) · only source for this CVE.

CVSS VectorVendor: HCL

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionCVE.org

HCL Connections is vulnerable to information disclosure 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.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

18
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +18
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

CVE-2020-4083 MEDIUM POC
5.5 Mar 05

HCL Connections 6.5 is vulnerable to possible information leakage. Rated medium severity (CVSS 5.5), this vulnerability

CVE-2020-4082 MEDIUM POC
5.4 Mar 05

The HCL Connections 5.5 help system is vulnerable to cross-site scripting, caused by improper validation of user-supplie

CVE-2016-3007 HIGH
8.8 Sep 26

Cross-site request forgery (CSRF) vulnerability in IBM Connections 4.x through 4.5 CR5, 5.0 before CR4, and 5.5 before C

CVE-2015-5038 HIGH
7.5 Jan 03

IBM Connections 3.x before 3.0.1.1 CR3, 4.0 before CR4, 4.5 before CR5, and 5.0 before CR3 does not properly detect recu

CVE-2016-2999 MEDIUM
6.5 Sep 26

IBM Connections 4.x through 4.5 CR5, 5.0 before CR4, and 5.5 before CR1 allows remote authenticated users to obtain sens

CVE-2025-52639 MEDIUM
6.5 Nov 18

HCL Connections is vulnerable to a sensitive information disclosure vulnerability which could allow a user to obtain sen

CVE-2024-30107 MEDIUM
6.5 Apr 18

HCL Connections contains a broken access control vulnerability that may expose sensitive information to unauthorized use

CVE-2023-28022 MEDIUM
6.5 Dec 15

HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive in

CVE-2020-4085 MEDIUM
6.5 Apr 22

"HCL Connections is vulnerable to possible information leakage and could disclose sensitive information via stack trace

CVE-2023-37533 MEDIUM
6.1 Nov 09

HCL Connections is vulnerable to reflected cross-site scripting (XSS) where an attacker may leverage these issues to exe

CVE-2014-0929 MEDIUM
6.0 Jun 08

Cross-site request forgery (CSRF) vulnerability in the Profiles component in IBM Connections through 3.0.1.1 CR3 allows

CVE-2024-30118 MEDIUM
5.7 Oct 09

HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive in

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