CVE-2020-28653

Name: CVE-2020-28653
Creator: NVD / NIST
Published: 2021-02-03T16:15:13.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 78.70%

Last modified Jun 17, 2026

CVE-2020-28653 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.. EPSS estimates a 78.70% chance of exploitation in the next 30 days.

Description

Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

78.70%

99.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Zohocorp	Manageengine Opmanager	< 12.5	—
Zohocorp	Manageengine Opmanager	12.5	Build125000

References

http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.htmlExploit, Third Party Advisory, VDB Entry
https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125203Release Notes, Vendor Advisory
https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125233Release Notes, Vendor Advisory
http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.htmlExploit, Third Party Advisory, VDB Entry
https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125203Release Notes, Vendor Advisory
https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125233Release Notes, Vendor Advisory

Timeline

Published: Feb 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28653?

Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.

How severe is CVE-2020-28653?

CVE-2020-28653 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 78.70% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28653?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28653?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST