CVE-2019-4541Network attack vector

Authenticated control bypass via incomplete input blacklist

Published Feb 4, 2020 · Updated Sep 17, 2024

Input validation bypass in IBM Security Directory Server 6.4.0 allows remote authenticated users to bypass application controls. IBM attributes the flaw to an incomplete input blacklist but has not published the affected component, accepted values, or request field. Exploitation requires high privileges over a network and permits data disclosure or service interruption; the public record names no integrity-changing operation.

CVSS severity6.5
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Input validation bypass in IBM Security Directory Server 6.4.0 allows remote authenticated users to bypass application controls. IBM attributes the flaw to an incomplete input blacklist but has not published the affected component, accepted values, or request field. Exploitation requires high privileges over a network and permits data disclosure or service interruption; the public record names no integrity-changing operation.

The record

CVE
CVE-2019-4541
Published
Feb 4, 2020
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Security Directory Server
Classifications
Unavailable
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

IBM · IBM Security Directory Serverversion=6.4.0

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5IBM CorporationCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
5.7IBM CorporationCVSS:3.0/PR:H/S:U/UI:N/C:H/I:N/A:H/AV:N/AC:L/RL:O/E:U/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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