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Public proof of conceptFix available

CVE-2020-28653

A public proof of concept exists; no exploitation attested.

  • Published2021-02-03
  • Fixed in12.5

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2021-02-0316:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-28653?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-28653?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Zohocorp manageengine opmanager
BranchAffectedFixed in
12.5< 12.512.5
12.5= 12.5no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Zohocorp manageengine opmanager to 12.5

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
3 repositories, unverifiedtuo4n8/CVE-2020-28653intrigueio/cve-2020-28653-pocmr-r3bot/ManageEngine-CVE-2020-28653
PoC-in-GitHub
Metasploit modules
1 moduleexploit/multi/http/opmanager_sumpdu_deserializationrank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-02-03
Last Modified
2026-06-17
NVD 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.

Is CVE-2020-28653 actively exploited?

Active exploitation of CVE-2020-28653 has not been confirmed. Its EPSS score was 77.9% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-28653?

CVE-2020-28653 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record