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Vulnerability record · CVE-2019-4520 · published 2 October 2019

CVE-2019-4520: Ibm security directory server improper restriction of authentication attempts vulnerability

Ibm · Security Directory Server

IBM Security Directory Server 6.4.0 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials. IBM X-Force ID: 165178.

7.5 CVSS 3.1 High EPSS 2.2% · top 18.0% CWE-307 · Improper restriction of authentication attempts
7.5CVSS 3.1 base score, v2 5.0
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

IBM Security Directory Server 6.4.0 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials. IBM X-Force ID: 165178.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://exchange.xforce.ibmcloud.com/vulnerabilities/165178 VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/1077045 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/165178 VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/1077045 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2022-32755Ibm security directory server xml injection vulnerabilityIBM Security Directory Server 6.4.0 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could …EPSS 0.71%9.1CVE-2022-33164Ibm security directory server path traversal vulnerabilityIBM Security Directory Server 7.2.0 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted U…EPSS 1.5%8.2CVE-2019-4538Ibm security directory server open redirect vulnerabilityIBM Security Directory Server 6.4.0 could allow a remote attacker to conduct phishing attacks, using an open redirect attack. By persuading a victim …EPSS 1.3%7.5CVE-2022-32759Ibm security directory integrator insufficient session expiration vulnerabilityIBM Security Directory Integrator 7.2.0 and IBM Security Verify Directory Integrator 10.0.0 uses insufficient session expiration which could allow an…EPSS 0.38%7.5CVE-2019-4540Ibm security directory server broken cryptographic algorithm vulnerabilityIBM Security Directory Server 6.4.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive infor…EPSS 0.79%7.5CVE-2015-1977Ibm tivoli directory server information exposure vulnerabilityDirectory traversal vulnerability in the Web Administration tool in IBM Tivoli Directory Server (ITDS) before 6.1.0.74-ISS-ISDS-IF0074, 6.2.x before …EPSS 1.7%7.2CVE-2019-4541Ibm security directory server vulnerabilityIBM Security Directory Server 6.4.0 uses incomplete blacklisting for input validation which allows attackers to bypass application controls resulting…EPSS 1.3%7.1CVE-2019-4539Ibm security directory server xml injection vulnerabilityIBM Security Directory Server 6.4.0 does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, cont…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2019-4520), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.