CVE-2026-56582
Undergoing Analysis Undergoing Analysis - In Progress

SSL/TLS LUCKY13 Vulnerability in HCL MyCloud

Vulnerability report for CVE-2026-56582, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: HCL Software

Description

HCL MyCloud was affected by the SSL/TLS LUCKY13 Vulnerability. An attacker may exploit this vulnerability to decrypt sensitive information through a TLS/SSL padding oracle attack.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-21
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
hcltech mycloud 10.8.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-327 The product uses a broken or risky cryptographic algorithm or protocol.

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Executive Summary

This vulnerability is a type of SSL/TLS attack called LUCKY13. It allows an attacker to decrypt sensitive information by exploiting weaknesses in the TLS/SSL padding oracle mechanism. The attack targets the timing differences in how systems handle encrypted data.

Detection Guidance

This vulnerability is related to SSL/TLS LUCKY13, which is a padding oracle attack. Detection typically involves checking for weak cipher suites or outdated SSL/TLS configurations. Use tools like OpenSSL to test for vulnerable protocols. For example, run 'openssl s_client -connect <target>:443 -tls1_2' to check supported protocols. Ensure no weak ciphers like RC4 or 3DES are enabled.

Impact Analysis

An attacker could exploit this to decrypt intercepted encrypted communications, potentially exposing sensitive data like login credentials or personal information. The impact is limited as it requires a local network position and specific conditions to be effective.

Compliance Impact

This vulnerability could lead to non-compliance with data protection regulations like GDPR or HIPAA if it results in unauthorized access to personal or health data. Organizations must address it to maintain secure data transmission and regulatory adherence.

Mitigation Strategies

Disable SSL/TLS protocols that are vulnerable to LUCKY13 attacks. Update HCL MyCloud to the latest version that patches this issue. Configure TLS settings to disable CBC-mode ciphers and enforce stronger encryption protocols like TLS 1.2 or higher.

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