CVE-2025-2487Network attack vector

Privileged service crash via unchecked MODDN failure

Published Mar 18, 2025 · Updated Jun 30, 2026

NULL pointer dereference in affected 389 Directory Server releases allows remote authenticated users to crash the LDAP service via MODDN. After a subtree rename fails, the MODDN path does not test a function return value before dereferencing the resulting NULL pointer. Exploitation requires LDAP rename privileges, and the demonstrated consequence is termination of the directory service rather than data access or modification.

CVSS severity4.9
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected 389 Directory Server releases allows remote authenticated users to crash the LDAP service via MODDN. After a subtree rename fails, the MODDN path does not test a function return value before dereferencing the resulting NULL pointer. Exploitation requires LDAP rename privileges, and the demonstrated consequence is termination of the directory service rather than data access or modification.

The record

CVE
CVE-2025-2487
Published
Mar 18, 2025
Updated
Jun 30, 2026
Vendor
389 Directory Server
Product
Red Hat Directory Server
Classifications
CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat Directory ServerAffected versions are unavailable in this record.
389 Directory Server · 389 Directory Serverversion=2.4.0 <=2.4.6; version=2.5.0 <=2.5.3; version=2.6.0 <=2.6.1; version=3.0.0 <=3.0.6
389 Directory Server · Red Hat Enterprise Linux 9.4 Extended Update SupportAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.

Published CVSS scores

4.9Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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