CVE-2026-77240Public exploitNetwork attack vector

Tenant takeover and disclosure via missing authorization

Published Sep 18, 2026 · Updated Sep 18, 2026

Authorization bypass in ArnasDon wacrm 0.7.0 and earlier allows remote authenticated users to take over tenants and read tenant data. The profiles_update policy leaves account_role and account_id writable, while two SECURITY DEFINER search functions trust p_account_id without checking membership. Any authenticated account can reach the affected database interfaces; exploitation grants cross-tenant reads and writes, while the published proof of concept remains unverified against a live deployment.

CVSS severity9.9
Critical
EPSS probability0.35%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in ArnasDon wacrm 0.7.0 and earlier allows remote authenticated users to take over tenants and read tenant data. The profiles_update policy leaves account_role and account_id writable, while two SECURITY DEFINER search functions trust p_account_id without checking membership. Any authenticated account can reach the affected database interfaces; exploitation grants cross-tenant reads and writes, while the published proof of concept remains unverified against a live deployment.

The record

CVE
CVE-2026-77240
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
ArnasDon
Product
wacrm
Classifications
CWE-639, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 0.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ArnasDon · wacrmversion=<= 0.7.0

Published CVSS scores

9.9GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1098Account Manipulation

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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