Apache HTTP Server: mod_md (ACME), unintended retry intervals_CVE-2025-55753

7.5 / 10

HIGH

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

Description

An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30 days in default configurations), to the backoff timer becoming 0. Attempts to renew the certificate then are repeated without delays until it succeeds.

This issue affects Apache HTTP Server: from 2.4.30 before 2.4.66.

Users are recommended to upgrade to version 2.4.66, which fixes the issue.

Basic Information

ID CVE-2025-55753

Source apache

Published Dec 5, 2025 at 10:12

Modified Dec 5, 2025 at 19:27

Affected Product

Vendor Apache Software Foundation

Product Apache HTTP Server

Version 2.4.30

Affected Versions Apache Software Foundation Apache HTTP Server 2.4.30

CWE Classification

CWE-190

References

httpd.apache.org /security/vulnerabilities_24.html

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