- 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.
- Source
- security@apache.org
- NVD status
- Analyzed
- Products
- http_server
CVSS 3.1
- Type
- Secondary
- Base score
- 7.5
- Impact score
- 3.6
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Severity
- HIGH
- security@apache.org
- CWE-190
- Hype score
- Not currently trending
Technical brief: Apache httpd <2.4.66 mod_md ACME retry logic integer overflow (CVE-2025-55753). Read more: 👉 https://t.co/3WcTkrWkqj #Security #SUSE https://t.co/FuHnUN1LO8
@Cezar_H_Linux
19 Dec 2025
13 Impressions
0 Retweets
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🔐 #Fedora 42 Security Advisory: Patch for CVE-2025-55753 in Apache mod_md is live. Fixes unintended retry intervals in the ACME client that could disrupt SSL cert automation. Read more: 👉 https://t.co/6RDaYrtGUH #Security https://t.co/DLqPuWlQK1
@Cezar_H_Linux
17 Dec 2025
39 Impressions
0 Retweets
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Apache HTTP Server CVE-2025-55753: mod_md (ACME), unintended retry intervals https://t.co/AdZUnjd4K9 CVE-2025-58098: Server Side Includes adds query string to #exec cmd=... https://t.co/77ushB6TZv CVE-2025-59775: NTLM Leakage on Windows through UNC SSRF https://t.co/1mTjz35NfJ
@oss_security
4 Dec 2025
364 Impressions
1 Retweet
2 Likes
0 Bookmarks
1 Reply
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[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F12C6C19-6BDC-46A8-8FF3-CD474A165126",
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