IBM Security Directory Server 6.4.0 uses an inadequate account lockout setting that could allow a remote attacker to brute force account cre
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Oct 2, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.2% · 82th percentile
- CWE
- CWE-307
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.2%
CNA vs NVD score
- NVD
- 7.5
- CNA · ibm
- 7.5
- agree
CVSS:3.0/AC:L/UI:N/PR:N/A:N/I:N/AV:N/S:U/C:H/RC:C/RL:O/E:U
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| ibm | security directory server | cpe:2.3:a:ibm:security_directory_server |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ibm security directory server6.4.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (ibm). Independent of NVD's CPE analysis and usually ahead of it.
IBM Security Directory Server
- 6.4.0affected
Same product
ibm: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-32755IBM Security Directory Server external entity injection36Monitor
- CVE-2022-33164IBM Security Directory Server path traversal36Monitor
- CVE-2019-4538IBM Security Directory Server 6.4.0 could allow a remote attacker to conduct phishing attacks, using an open redirect attack.32Monitor
- CVE-2019-4540IBM Security Directory Server 6.4.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensit30Monitor
- CVE-2019-4541IBM Security Directory Server 6.4.0 uses incomplete blacklisting for input validation which allows attackers to bypass application controls 28Monitor
- CVE-2019-4539IBM Security Directory Server 6.4.0 does not properly neutralize special elements that are used in XML, allowing attackers to modify the syn28Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-307 · Improper Restriction of Excessive Authentication AttemptsCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Dictionary-based Password AttackCAPEC-16likelihood: Medium · High
- Password Brute ForcingCAPEC-49likelihood: Medium · High
- Use of Known Domain CredentialsCAPEC-560likelihood: High · High
- Password SprayingCAPEC-565likelihood: High · High
- Credential StuffingCAPEC-600likelihood: High · High
- Use of Known Kerberos CredentialsCAPEC-652likelihood: Medium · High
- Use of Known Operating System CredentialsCAPEC-653likelihood: High · High
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.