CVE-2021-3287
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a...
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
- Record
CVE-2021-3287- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-502
- Updated
- 2026-11-02
CVE List No score
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
- Record
CVE-2021-3287- Updated
- 2026-11-02
EUVDEUVD-2021-26622 No score
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
- Record
EUVD-2021-26622- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9342-c88m-74xw
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a...
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
- Record
GHSA-9342-c88m-74xw- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | ManageEngine OpManager SumPDU Java Deserialization | 2021-07-26 |
| Nuclei | Zoho ManageEngine OpManager < 12.5.329 - Remote Code Execution |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Metasploit, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3287 is a critical vulnerability (CVSS 9.8) in Zohocorp Manageengine Opmanager, published April 22, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 51.3%, the 98th percentile. No source names a fixed version.