CVE-2026-86008Public exploitNetwork attack vectorHinoki check available

Account takeover via domain-only authorization

Published Oct 16, 2026 · Updated Oct 16, 2026

Authorization failure in Mailu's admin UI allows remote authenticated users with domain-manager rights to take over privileged accounts. Before commit 8577c929b4ade04d3cd4210cf036601abd793556, access.domain_admin and access.owner authorize password resets and token creation by mailbox domain without checking the target's privileges. The target must own a mailbox in the managed domain; takeover grants that account's permissions, including global administration or management of other domains.

CVSS severity7.2
High
EPSS probability0.31%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization failure in Mailu's admin UI allows remote authenticated users with domain-manager rights to take over privileged accounts. Before commit 8577c929b4ade04d3cd4210cf036601abd793556, access.domain_admin and access.owner authorize password resets and token creation by mailbox domain without checking the target's privileges. The target must own a mailbox in the managed domain; takeover grants that account's permissions, including global administration or management of other domains.

The record

CVE
CVE-2026-86008
Published
Oct 16, 2026
Updated
Oct 16, 2026
Vendor
Mailu
Product
Mailu
Classifications
CWE-285, T1098
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 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=< 8577c929b4ade04d3cd4210cf036601abd793556

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Mailu · Mailuversion=< 8577c929b4ade04d3cd4210cf036601abd793556

Published CVSS scores

7.2MailuCVSS:3.1/AV:N/AC:L/PR:H/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization
T1098Account Manipulation

Public exploit references

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Technologies

Your stack

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