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CVE-2025-55753

7.5 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.5 · apacheNVD modified 2026-10-18 15:10

Affected (CPE criteria) 1

  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

References 2