CVE-2025-15579

An Insecure Deserialization vulnerability has been discovered in OpenText™ Directory Services.

Published Feb 18, 2026 CVSS 4.0 · 9.5 Critical EPSS < 1% KEV · Not listed
Description
Deserialization of Untrusted Data vulnerability in OpenText™ Directory Services allows Object Injection. 

The vulnerability could lead to remote code execution, denial of service, or privilege escalation.

This issue affects Directory Services: before 24.4.16, from 25.1 before 25.1.9, from 25.2 before 25.2.9, from 25.3 before 25.3.8, from 25.4 before 25.4.5, from 26.1 before 26.1.2.

Remediation

Vendor Solution

https://support.opentext.com/csm?id=ot_kb_unauthenticated&sysparm_article=KB0859600&sys_kb_id=f82c01214707b6144549b6bd416d43b7&spa=1

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description Deserialization of Untrusted Data vulnerability in OpenText™ Directory Services allows Object Injection. The vulnerability could lead to remote code execution, denial of service, or privilege escalation. This issue affects Directory Services: from 10.5 through 26.1. Deserialization of Untrusted Data vulnerability in OpenText™ Directory Services allows Object Injection.  The vulnerability could lead to remote code execution, denial of service, or privilege escalation. This issue affects Directory Services: before 24.4.16, from 25.1 before 25.1.9, from 25.2 before 25.2.9, from 25.3 before 25.3.8, from 25.4 before 25.4.5, from 26.1 before 26.1.2.
Type Values Removed Values Added
First Time appeared Opentext
Opentext directory Services
Vendors & Products Opentext
Opentext directory Services
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Deserialization of Untrusted Data vulnerability in OpenText™ Directory Services allows Object Injection. The vulnerability could lead to remote code execution, denial of service, or privilege escalation. This issue affects Directory Services: from 10.5 through 26.1.
Title An Insecure Deserialization vulnerability has been discovered in OpenText™ Directory Services.
Weaknesses CWE-502
References
Metrics cvssV4_0

{'score': 9.5, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P/AU:Y/R:U/V:C/RE:M/U:Red'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
OpenText
Published
Updated
Feb 27, 2026, 9:46 PM
Reserved
Feb 17, 2026, 3:58 PM
Status
Deferred
Published
Feb 18, 2026, 4:22 PM
Modified
Jun 17, 2026, 8:38 AM