CVE-2025-15579: An Insecure Deserialization vulnerability has been discovered in OpenText™ Directory Services.

Severity: critical (CVSS 9.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-18 · updated 2026-06-17
Weakness: CWE-502

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.

Affected products

OpenText™ 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 — fixed in 24.4.16, 25.1.9, 25.2.9, 25.3.8, 25.4.5, 26.1.2

How to fix

Upgrade to a fixed version: OpenText™ Directory Services 24.4.16, 25.1.9, 25.2.9, 25.3.8. Check the vendor advisory for mitigations.

References

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

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