CVE-2026-16053Network attack vectorHinoki check available

Authenticated file deletion via unvalidated backup paths

Published Aug 11, 2026 · Updated Aug 11, 2026

Path traversal in ManageEngine M365 Manager Plus and M365 Security Plus before 4820 allows remote authenticated users to delete server files. The Exchange Online backup module processes supplied file and folder paths without ensuring that they remain within permitted locations. A low-privilege account and network access to the backup function are required; successful exploitation deletes files and can interrupt service.

CVSS severity8.5
High
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in ManageEngine M365 Manager Plus and M365 Security Plus before 4820 allows remote authenticated users to delete server files. The Exchange Online backup module processes supplied file and folder paths without ensuring that they remain within permitted locations. A low-privilege account and network access to the backup function are required; successful exploitation deletes files and can interrupt service.

The record

CVE
CVE-2026-16053
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Zoho Corporation
Product
ManageEngine M365 Manager Plus
Classifications
CWE-23, T1070.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <4820

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoho Corporation · ManageEngine M365 Manager Plusversion=0 <4820
Zoho Corporation · ManageEngine M365 Security Plusversion=0 <4820

Published CVSS scores

8.5Zoho CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-23Relative Path Traversal
T1070.004File Deletion

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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