How severe is CVE-2020-4129?

CVE-2020-4129 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-2020-4129 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-2020-4129?

CVE-2020-4129 primarily affects Hcltech Hcl Domino. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4129?

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

When was CVE-2020-4129 published?

CVE-2020-4129 was published on 2020-12-01 and last updated on 2026-06-17.

CVE-2020-4129

CVE-2020-4129 is a medium-severity vulnerability in Hcltech Hcl 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 Hcl Domino
Published: 2020-12-01
Last modified: 2026-06-17

Description

HCL Domino is susceptible to a lockout policy bypass vulnerability in the LDAP service. An unauthenticated attacker could use this vulnerability to mount a brute force attack against the LDAP service. Fixes are available in HCL Domino versions 9.0.1 FP10 IF6, 10.0.1 FP6 and 11.0.1 FP1 and later.

Frequently asked questions

What is CVE-2020-4129?: HCL Domino is susceptible to a lockout policy bypass vulnerability in the LDAP service. An unauthenticated attacker could use this vulnerability to mount a brute force attack against the LDAP service. Fixes are available in HCL Domino versions 9.0.1 FP10 IF6, 10.0.1 FP6 and 11.0.1 FP1 and later.
How severe is CVE-2020-4129?: CVE-2020-4129 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-2020-4129 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-2020-4129?: CVE-2020-4129 primarily affects Hcltech Hcl Domino. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4129?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4129 published?: CVE-2020-4129 was published on 2020-12-01 and last updated on 2026-06-17.

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0085407

Affected products (10)

cpe:2.3:a:hcltech:hcl_domino:*:*:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:9.0.1:feature_pack_10_interim_fix_2:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:9.0.1:feature_pack_10_interim_fix_3:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:9.0.1:feature_pack_10_interim_fix_4:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:9.0.1:feature_pack_10_interim_fix_5:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:10.0.1:fixpack1:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:10.0.1:fixpack2:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:10.0.1:fixpack3:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:10.0.1:fixpack4:*:*:*:*:*:*
cpe:2.3:a:hcltech:hcl_domino:10.0.1:fixpack5:*:*:*:*:*:*

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