How severe is CVE-2025-53020?

CVE-2025-53020 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-53020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53020?

CVE-2025-53020 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-53020?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-53020 have an EU (EUVD) identifier?

Yes. CVE-2025-53020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21015.

When was CVE-2025-53020 published?

CVE-2025-53020 was published on 2025-07-10 and last updated on 2026-06-17.

CVE-2025-53020

CVE-2025-53020 is a high-severity vulnerability in Apache Http Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21015
Weakness: CWE-401
Affected product: Apache Http Server
Published: 2025-07-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-53020?: CVE-2025-53020 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-53020 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53020?: CVE-2025-53020 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-53020?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-53020 have an EU (EUVD) identifier?: Yes. CVE-2025-53020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21015.
When was CVE-2025-53020 published?: CVE-2025-53020 was published on 2025-07-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

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CVE-2021-3492 — High (CVSS 8.8): Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring…
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Threat intelligence

Threat-intel indicators referencing this CVE:

37.120.213.13 (ipv4-addr)
50.255.62.89 (ipv4-addr)
147.15.15.226 (ipv4-addr)
77.90.185.88 (ipv4-addr)
77.90.185.87 (ipv4-addr)
74.87.117.150 (ipv4-addr)
60.199.224.2 (ipv4-addr)
49.0.24.107 (ipv4-addr)