CVE-2020-10189Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via unsafe object deserialization

Published Mar 6, 2020 · Updated Oct 21, 2025

Deserialization in FileStorage.getChartImage in Zoho ManageEngine Desktop Central before 10.0.474 allows remote attackers to execute code. CewolfServlet passes the attacker-controlled img value to getChartImage, which opens the selected file and calls ObjectInputStream.readObject without validating its contents. The unauthenticated MDMLogUploaderServlet path writes a crafted serialized file that CewolfServlet then loads, allowing code to run as SYSTEM or root.

CVSS severity9.8
Critical
EPSS probability99.94%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in FileStorage.getChartImage in Zoho ManageEngine Desktop Central before 10.0.474 allows remote attackers to execute code. CewolfServlet passes the attacker-controlled img value to getChartImage, which opens the selected file and calls ObjectInputStream.readObject without validating its contents. The unauthenticated MDMLogUploaderServlet path writes a crafted serialized file that CewolfServlet then loads, allowing code to run as SYSTEM or root.

The record

CVE
CVE-2020-10189
Published
Mar 6, 2020
Updated
Oct 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8Source InciteCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsShadowserver observations through Sep 15, 2026. Gaps indicate unavailable data.
Sep 9, 2026Sep 15, 2026
View daily counts
Reporting dayUnique IPs
Sep 9, 2026Unavailable
Sep 10, 2026Unavailable
Sep 11, 2026Unavailable
Sep 12, 2026Unavailable
Sep 13, 2026Unavailable
Sep 14, 20261
Sep 15, 2026Unavailable
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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