Is CVE-2025-55753 actively exploited?

CVE-2025-55753 has no public evidence of in-the-wild exploitation as of 2025-12-10.

What is the CVSS score for CVE-2025-55753?

CVE-2025-55753 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

How do I patch CVE-2025-55753?

Patch guidance is available from apache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-55753.

Fix CVE-2025-55753 - HIGH apache http server

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-190 · Integer Overflow

Metadata

Primary Vendor: APACHE
Published: 12/5/2025
Last Modified: 12/10/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-55753

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary