CVE-2020-4129

Name: CVE-2020-4129
Creator: NVD / NIST
Published: 2020-12-01T00:15:11.257+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2020-4129 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.93%

56.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Hcltech	Hcl Domino	< 9.0.1	—
Hcltech	Hcl Domino	>= 10.0.0, < 10.0.1	—
Hcltech	Hcl Domino	>= 11.0.0, < 11.0.1	—
Hcltech	Hcl Domino	9.0.1	Feature Pack 10 Interim Fix 2
Hcltech	Hcl Domino	10.0.1	Fixpack1

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0085407Vendor Advisory
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0085407Vendor Advisory

Timeline

Published: Dec 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4129?

How severe is CVE-2020-4129?

CVE-2020-4129 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4129?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-4129?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST