Vulnerability Intelligence Report
Apache HTTP Server: HTTP/2 DoS by Memory Increase
CVE-2025-53020
Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63. Users are recommended to upgrade to version 2.4.64, which fixes the issue.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:4.41%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-401 ↗CWE-401 Missing Release of Memory after Effective Lifetime
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 2.4.17 <= 2.4.63 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
4.409%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Apache Software Foundation · Vendor · USA |
| Reserved | 2025-06-24T07:13:19 |
| Published | 2025-07-10T16:59:06 |
| Last Updated | 2025-11-04T21:11:43 |
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