How severe is CVE-2020-14258?

CVE-2020-14258 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-14258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-14258?

CVE-2020-14258 primarily affects Hcltech Notes. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-14258?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-14258 published?

CVE-2020-14258 was published on 2020-11-21 and last updated on 2026-06-17.

CVE-2020-14258

CVE-2020-14258 is a high-severity vulnerability in Hcltech Notes with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Hcltech Notes
Published: 2020-11-21
Last modified: 2026-06-17

Description

HCL Notes is susceptible to a Denial of Service vulnerability caused by improper validation of user-supplied input. A remote unauthenticated attacker could exploit this vulnerability using a specially-crafted email message to hang the client. Versions 9, 10 and 11 are affected.

Frequently asked questions

What is CVE-2020-14258?: HCL Notes is susceptible to a Denial of Service vulnerability caused by improper validation of user-supplied input. A remote unauthenticated attacker could exploit this vulnerability using a specially-crafted email message to hang the client. Versions 9, 10 and 11 are affected.
How severe is CVE-2020-14258?: CVE-2020-14258 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-14258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-14258?: CVE-2020-14258 primarily affects Hcltech Notes. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-14258?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-14258 published?: CVE-2020-14258 was published on 2020-11-21 and last updated on 2026-06-17.

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0085304

Affected products (3)

cpe:2.3:a:hcltech:notes:9.0:*:*:*:*:*:*:*
cpe:2.3:a:hcltech:notes:10.0:*:*:*:*:*:*:*
cpe:2.3:a:hcltech:notes:11.0:*:*:*:*:*:*:*

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