CVE-2025-53020

HIGHNVD 7.57.5—Trending — 4 sources updated this weekElevated

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 87.7%
KEV: Not listed

Published

July 10, 2025

Last Modified

November 4, 2025

References (3)

security@apachehttps://httpd.apache.org/security/vulnerabilities_24.html
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/07/10/10
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html

Vendor Advisories for CVE-2025-53020(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	apache2-utils (2.4.63-1ubuntu1.1) @ plucky	2026-05-30	ubuntu
ubuntu	apache2-utils (2.4.18-2ubuntu3.17+esm16) @ xenial	2026-05-30	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-401Missing Release of Memory after Effective Lifetime (Memory Leak)

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-30 02:04 UTCEG score recompute
2026-05-30 02:04 UTCVendor advisory
2026-05-30 02:04 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCgalbarnahum/CVE-2025-53020-PoC
First seen Jan 12, 2026
PoC for CVE-2025-53020 - HPACK bombing for Apache HTTPD.
Open source ↗

Frequently asked(5)

What is CVE-2025-53020?

CVE-2025-53020 is a high vulnerability published on July 10, 2025. 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.

When was CVE-2025-53020 disclosed?

CVE-2025-53020 was first published in the National Vulnerability Database on July 10, 2025, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-53020 actively exploited?

CVE-2025-53020 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-53020?

CVE-2025-53020 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2025-53020?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53020, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-53020

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CVE-2025-53020

Published

Last Modified

References (3)

Vendor Advisories for CVE-2025-53020(2)

Patch Availability(2)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-53020?

Same vendor

Same CWE

CVE-2025-53020

📅 Published

🔄 Last Modified

🔗 References (3)

📣 Vendor Advisories for CVE-2025-53020(2)

Patch Availability(2)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-53020?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

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Last Modified

References (3)

Vendor Advisories for CVE-2025-53020(2)

Frequently asked(5)

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