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CVE-2025-55753
Published: Dec 5, 2025
Modified: Dec 5, 2025
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
Apache Software Foundation | Apache HTTP Server | affected 2.4.30 - < 2.4.66 |
Weaknesses (CWE)
References
https://httpd.apache.org/security/vulnerabilities_24.html
vendor-advisory
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