CVE-2026-75458Public exploitNetwork attack vector

Administrator account deletion via unchecked target role

Published Aug 31, 2026 · Updated Sep 1, 2026

Missing authorization in XueZhiSi Open Source Exam System 3.9.0 and earlier allows remote authenticated users to delete administrator accounts. The teacher delete endpoint accepts an arbitrary user ID and performs getUserById, setDeleted(true), and updateByIdFilter without comparing actor and target roles. A teacher account with role 2 can therefore mark a role 3 administrator deleted, removing that administrator's access.

CVSS severity8.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in XueZhiSi Open Source Exam System 3.9.0 and earlier allows remote authenticated users to delete administrator accounts. The teacher delete endpoint accepts an arbitrary user ID and performs getUserById, setDeleted(true), and updateByIdFilter without comparing actor and target roles. A teacher account with role 2 can therefore mark a role 3 administrator deleted, removing that administrator's access.

The record

CVE
CVE-2026-75458
Published
Aug 31, 2026
Updated
Sep 1, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, T1531
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1531Account Access Removal

Public exploit references

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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