CVE-2025-15579
📋 TL;DR
CVE-2025-15579 is a deserialization vulnerability in OpenText Directory Services that allows attackers to inject malicious objects. If exploited, it could lead to remote code execution, denial of service, or privilege escalation. This affects OpenText Directory Services versions 10.5 through 26.1.
💻 Affected Systems
- OpenText Directory Services
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with SYSTEM/root privileges leading to complete system compromise
Likely Case
Denial of service or privilege escalation to gain unauthorized access to directory data
If Mitigated
Limited impact if network segmentation and strict access controls prevent exploitation attempts
🎯 Exploit Status
Deserialization vulnerabilities typically require crafting specific payloads but can be exploited remotely
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 26.2 or later
Vendor Advisory: https://support.opentext.com/csm?id=ot_kb_unauthenticated&sysparm_article=KB0859600&sys_kb_id=f82c01214707b6144549b6bd416d43b7&spa=1
Restart Required: Yes
Instructions:
1. Download patch from OpenText support portal 2. Backup current installation 3. Apply patch following vendor instructions 4. Restart Directory Services
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Directory Services to only trusted systems
Input Validation Filtering
allImplement WAF or proxy rules to filter suspicious deserialization patterns
🧯 If You Can't Patch
- Isolate affected systems in separate network segments with strict firewall rules
- Implement application-level monitoring for deserialization attempts and suspicious activities
🔍 How to Verify
Check if Vulnerable:
Check OpenText Directory Services version via administration console or installation directoryCheck Version:
Check version in administration console or installation propertiesVerify Fix Applied:
Verify version is 26.2 or later and test directory service functionality📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization errors
- Unexpected process creation
- Authentication anomalies
Network Indicators:
- Unusual traffic patterns to directory service ports
- Malformed serialized data in network traffic
SIEM Query:
source="opentext-directory" AND (error="deserialization" OR process="unexpected")