CVE-2025-55753

HIGH | Platform: macOS | Changelog

CVE Details

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.

CVSS 3.1 Score

Metric	Value
Base Score	7.5 (HIGH)
Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

Weakness

CWE-190

References

Apple Security Advisory
NVD Entry
https://httpd.apache.org/security/vulnerabilities_24.html (Vendor Advisory)
http://www.openwall.com/lists/oss-security/2025/12/04/4 (Issue Tracking, Third Party Advisory)