Authenticated information disclosure via TLS timing oracle
Published Jul 21, 2026 · Updated Jul 21, 2026
A TLS padding oracle in HCLSoftware HCL MyCloud 10.8.2 allows remote authenticated users to decrypt sensitive information. Its TLS/SSL CBC record processing exposes padding validity through timing differences, enabling a Lucky13 attack; HCL has not identified the affected component or implementation. Exploitation requires low-privileged access and repeated network measurements under high-complexity conditions, and the reported effect is limited to confidentiality.
Summary
What happened
A TLS padding oracle in HCLSoftware HCL MyCloud 10.8.2 allows remote authenticated users to decrypt sensitive information. Its TLS/SSL CBC record processing exposes padding validity through timing differences, enabling a Lucky13 attack; HCL has not identified the affected component or implementation. Exploitation requires low-privileged access and repeated network measurements under high-complexity conditions, and the reported effect is limited to confidentiality.
The record
- CVE
- CVE-2026-56582
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- HCLSoftware
- Product
- HCL MyCloud
- Classifications
- CWE-327
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=10.8.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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