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Vulnerability record · CVE-2021-20618 · published 14 January 2021

CVE-2021-20618: Acmailer improper privilege management vulnerability

Acmailer · Acmailer

Privilege chaining vulnerability in acmailer ver. 4.0.2 and earlier, and acmailer DB ver. 1.1.4 and earlier allows remote attackers to bypass authentication and to gain an administrative privilege which may result in obtaining the sensitive information on the server via unspecified vectors.

9.8 CVSS 3.1 Critical EPSS 3.3% · top 11.9% CWE-269 · Improper privilege management
9.8CVSS 3.1 base score, v2 10.0
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Privilege chaining vulnerability in acmailer ver. 4.0.2 and earlier, and acmailer DB ver. 1.1.4 and earlier allows remote attackers to bypass authentication and to gain an administrative privilege which may result in obtaining the sensitive information on the server via unspecified vectors.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://jvn.jp/en/jp/JVN35906450/index.html Third Party Advisory
https://www.acmailer.jp/info/de.cgi?id=101 Vendor Advisory
https://jvn.jp/en/jp/JVN35906450/index.html Third Party Advisory
https://www.acmailer.jp/info/de.cgi?id=101 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-20618), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.