CVE-2020-28653
Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows...
Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.
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 Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.
- Record
CVE-2020-28653- 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 - Updated
- 2026-11-02
CVE List No score
Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.
- Record
CVE-2020-28653- Updated
- 2026-11-02
EUVDEUVD-2020-21051 No score
Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.
- Record
EUVD-2020-21051- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hxf4-fh6h-hq94
Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows...
Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.
- Record
GHSA-hxf4-fh6h-hq94- 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 - 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 |
| PoC in GitHub | tuo4n8/CVE-2020-28653 | 2021-07-31 |
| PoC in GitHub | intrigueio/cve-2020-28653-poc | 2021-09-13 |
| PoC in GitHub | mr-r3bot/ManageEngine-CVE-2020-28653 | 2022-04-07 |
| Nuclei | ManageEngine OpManager SumPDU 12.1 - 12.5.232 - Java Deserialization |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Metasploit, Nuclei, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28653 is a critical vulnerability (CVSS 9.8) in Zohocorp Manageengine Opmanager, published February 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 77.9%, the 99th percentile. No source names a fixed version.