What’s Vulnerable › Vulnerabilities

CVE-2020-4089

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-26 · updated 2026-06-17

Description

HCL Notes is vulnerable to an information leakage vulnerability through its support for the 'mailto' protocol. This vulnerability could result in files from the user's filesystem or connected network filesystems being leaked to a third party. All versions of HCL Notes 9, 10 and 11 are affected.

Affected products

• HCL Notes: 9.0, 10.0, 11.0

References

• https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0080343
• https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0080343

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