CVE-2025-55753

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.

Database specific

{
    "cna_assigner": "apache",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "2.4.30"
                },
                {
                    "fixed": "2.4.66"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "2.4.30"
                },
                {
                    "fixed": "2.4.66"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55753.json"
}

References

Affected packages

Git / github.com/apache/httpd

Affected ranges

Type

GIT

Repo

https://github.com/apache/httpd

Events

Introduced

3fe4a02b4936b73a10009ac8ea2c742730ccbe42

Fixed

e4a77ef6051b3fe22eafacbcf54855b178a0bddd

Database specific

{
    "cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "2.4.30"
        },
        {
            "fixed": "2.4.66"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-55753.json"