CVE-2026-70408

Deferred Deferred - Pending Action

Incorrect Authorization in acmailer Allows Privilege Escalation

Publication date: 2026-08-19

Last updated on: 2026-08-28

Assigner: JPCERT/CC

Description

An incorrect authorization vulnerability exists in acmailer, which may allow a user to create a sub-account that has administrative privileges.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-28

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-70408

EUVD

EUVD-2026-62238

Affected Vendors & Products

Vendor	Product	Version / Range
extra_innovation_inc	acmailer	to 4.1.2 (exc)
extra_innovation_inc	acmailer_db	to 1.2.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability in acmailer allows a user to create a sub-account with administrative privileges due to incorrect authorization checks. This means unauthorized users could gain elevated access, potentially controlling the system or user data.

Detection Guidance

To detect this vulnerability, check the version of acmailer installed on your system. Compare it against the patched versions: CGI versions prior to 4.1.2 and DB versions prior to 1.2.2 are vulnerable. Use commands like 'acmailer --version' or check the version in the software's configuration files or web interface.

Impact Analysis

An attacker could exploit this to create admin-level sub-accounts, leading to unauthorized access, data theft, or system manipulation. This could compromise email delivery, user accounts, and sensitive information.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Non-compliance risks legal penalties and reputational damage.

Mitigation Strategies

Update acmailer to version 4.1.2 (CGI) or later and acmailer DB to version 1.2.2 (DB) or later to address the incorrect authorization vulnerability.

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