How severe is CVE-2020-14260?

CVE-2020-14260 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-14260 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-14260?

CVE-2020-14260 affects Hcltech Domino. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-14260?

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

When was CVE-2020-14260 published?

CVE-2020-14260 was published on 2020-12-02 and last updated on 2026-06-17.

CVE-2020-14260

CVE-2020-14260 is a critical-severity vulnerability in Hcltech Domino with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Hcltech Domino
Published: 2020-12-02
Last modified: 2026-06-17

Description

HCL Domino is susceptible to a Buffer Overflow vulnerability in DXL due to improper validation of user input. A successful exploit could enable an attacker to crash Domino or execute attacker-controlled code on the server system.

Frequently asked questions

What is CVE-2020-14260?: HCL Domino is susceptible to a Buffer Overflow vulnerability in DXL due to improper validation of user input. A successful exploit could enable an attacker to crash Domino or execute attacker-controlled code on the server system.
How severe is CVE-2020-14260?: CVE-2020-14260 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-14260 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-14260?: CVE-2020-14260 affects Hcltech Domino. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-14260?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-14260 published?: CVE-2020-14260 was published on 2020-12-02 and last updated on 2026-06-17.

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0085500

Affected products (1)

cpe:2.3:a:hcltech:domino:*:*:*:*:*:*:*:*

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