CVE-2025-55753

| EUVD-2025-201395 HIGH
2025-12-05 [email protected]
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 15, 2026 - 17:08 euvd
EUVD-2025-201395
Analysis Generated
Mar 15, 2026 - 17:08 vuln.today
CVE Published
Dec 05, 2025 - 11:15 nvd
HIGH 7.5

Tags

Buffer Overflow Integer Overflow Apache Ubuntu Debian Http Server Redhat Suse

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.

Analysis

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.

Technical Context

An integer overflow occurs when an arithmetic operation produces a value that exceeds the maximum (or minimum) size of the integer type used to store it. This vulnerability is classified as Integer Overflow or Wraparound (CWE-190).

Affected Products

Affected products: Apache Http Server

Remediation

Use safe integer arithmetic libraries. Check for overflow conditions before operations. Use appropriately sized integer types.

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +38
POC: 0

Vendor Status

Ubuntu

Priority: Low
apache2
Release Status Version
trusty needs-triage -
xenial needs-triage -
bionic needs-triage -
focal needs-triage -
plucky ignored end of life, was needs-triage
jammy released 2.4.52-1ubuntu4.18
noble released 2.4.58-1ubuntu8.10
questing released 2.4.64-1ubuntu3.2
upstream released 2.4.66
USN-7968-1

Debian

Bug #1121926
apache2
Release Status Fixed Version Urgency
bullseye fixed 2.4.66-1~deb11u1 -
bullseye (security) fixed 2.4.66-1~deb11u1 -
bookworm fixed 2.4.66-1~deb12u1 -
bookworm (security) vulnerable 2.4.62-1~deb12u2 -
trixie fixed 2.4.66-1~deb13u1 -
forky, sid fixed 2.4.66-8 -
(unstable) fixed 2.4.66-1 -
DLA-4452-1

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CVE-2025-55753 vulnerability details – vuln.today
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