How severe is CVE-2020-4128?

CVE-2020-4128 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-4128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4128?

CVE-2020-4128 primarily affects Hcltech Domino. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4128?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-4128 published?

CVE-2020-4128 was published on 2020-12-01 and last updated on 2026-06-17.

CVE-2020-4128

CVE-2020-4128 is a medium-severity vulnerability in Hcltech Domino with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Hcltech Domino
Published: 2020-12-01
Last modified: 2026-06-17

Description

HCL Domino is susceptible to a lockout policy bypass vulnerability in the ID Vault service. An unauthenticated attacker could use this vulnerability to mount a brute force attack against the ID Vault service.

Frequently asked questions

What is CVE-2020-4128?: HCL Domino is susceptible to a lockout policy bypass vulnerability in the ID Vault service. An unauthenticated attacker could use this vulnerability to mount a brute force attack against the ID Vault service.
How severe is CVE-2020-4128?: CVE-2020-4128 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-4128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4128?: CVE-2020-4128 primarily affects Hcltech Domino. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4128?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4128 published?: CVE-2020-4128 was published on 2020-12-01 and last updated on 2026-06-17.

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0085408

Affected products (6)

cpe:2.3:a:hcltech:domino:*:*:*:*:*:*:*:*
cpe:2.3:a:hcltech:domino:10.0.1:-:*:*:*:*:*:*
cpe:2.3:a:hcltech:domino:10.0.1:fix_pack_1:*:*:*:*:*:*
cpe:2.3:a:hcltech:domino:10.0.1:fix_pack_2:*:*:*:*:*:*
cpe:2.3:a:hcltech:domino:10.0.1:fix_pack_3:*:*:*:*:*:*
cpe:2.3:a:hcltech:domino:10.0.1:fix_pack_4:*:*:*:*:*:*

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