CVE-2020-4097

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-11-05 · updated 2026-06-17
Weakness: CWE-120

Description

In HCL Notes version 9 previous to release 9.0.1 FixPack 10 Interim Fix 8, version 10 previous to release 10.0.1 FixPack 6 and version 11 previous to 11.0.1 FixPack 1, a vulnerability in the input parameter handling of the Notes Client could potentially be exploited by an attacker resulting in a buffer overflow. This could enable an attacker to crash HCL Notes or execute attacker-controlled code on the client.

Affected products

HCL Notes: from 9.0 through 9.0.1; from 11.0 through 11.0.1; 9.0.1-fp10, 9.0.1-fp10if1, 9.0.1-fp10if2, 9.0.1-fp10if3, 9.0.1-fp10if4, 9.0.1-fp10if5 (+32)

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0084796
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0084796

Get alerted when CVE-2020-4097 or the next vulnerability affects your stack