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CVE-2020-28653· NVD / CVE Program· CNA mitre

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

Noroxi assessment

Priority: This week (action score 63/100)

  • A ready-made attack module is public (Metasploit, Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 78.7% (FIRST EPSS); higher than 99.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

CriticalCVSS 9.8 · v3.1—Weaponized No fix recorded
Published
Feb 3, 2021
Updated
Jun 16, 2026
EPSS
78.7% · 99th percentile
CWE
—

Report tools

JSON

Action score

63

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
24 / 30 · 78.7%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
zohocorpmanageengine opmanager

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • zohocorp manageengine opmanagerbefore 12.5
  • zohocorp manageengine opmanager12.5

Same product

zohocorp: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-29535Zoho ManageEngine OPManager through 125588 allows SQL Injection via a few default reports.
    67This week
  • CVE-2021-41288Zoho ManageEngine OpManager version 125466 and below is vulnerable to SQL Injection in the getReportData API.
    63This week
  • CVE-2019-17602An issue was discovered in Zoho ManageEngine OpManager before 12.4 build 124089.
    63This week

Published before and after this one in the same product

  • ← EarlierCVE-2020-12116May 7, 2020 · Zoho ManageEngine OpManager Stable build before 124196 and Released build before 125125 allows an unauthenticated attacker to read arbitrary
    59Plan
  • ← EarlierCVE-2020-13818Jun 4, 2020 · In Zoho ManageEngine OpManager before 125144, when <cachestart> is used, directory traversal validation can be bypassed.
    41Plan
  • Later →CVE-2021-20078Apr 1, 2021 · Manage Engine OpManager builds below 125346 are vulnerable to a remote denial of service vulnerability due to a path traversal issue in spar
    54Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2020-28653 —
Proof-of-concept repository on GitHubstars:22021-07-31
Proof-of-concept repository on GitHubstars:12021-09-13
Proof-of-concept repository on GitHubstars:02022-04-07
Metasploit moduleexploit/multi/http/opmanager_sumpdu_deserializationManageEngine OpManager SumPDU Java Deserializationexploit2021-07-26

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Metasploit+172 d
  3. First PoC+177 d
  4. TodayOct 25, 2026+2090 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records