What’s Vulnerable › Vulnerabilities

CVE-2021-3287

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 51.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-22 · updated 2026-06-17
• Weakness: CWE-502

Description

Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.

Affected products

• Zohocorp ManageEngine OpManager: before 12.5; 12.5, 12.5-build125000, 12.5-build125002, 12.5-build125100, 12.5-build125101, 12.5-build125102 (+59) — fixed in 12.5

How to fix

Upgrade to a fixed version: Zohocorp ManageEngine OpManager 12.5. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.html
• https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125329
• http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.html
• https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125329

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