CVE-2025-53020

mediumpriority · track · 12EPSS 0.050 · 92 %ileexploit · PoCDEEUJPRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

4.96% (92nd) EPSS

CVSS 5.3 · medium

Is it mine?

72 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

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

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.3–7.5

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-401USCWE-401US

exploits (1)

Public proof-of-concept and weaponised exploit code.

galbarnahum/CVE-2025-53020-PoCPoC for CVE-2025-53020 - HPACK bombing for Apache HTTPD.PoC · poc_in_github

affected products (72)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell Avamarall versionscert_bundDEcpe:/a:dell:avamar:-
Dell NetWorker Virtual Editionall versionscert_bundDEcpe:/a:dell:networker:virtual_edition
Dell PowerProtect Data Domainall versionscert_bundDEcpe:/a:dell:powerprotect_data_domain:-
Dell PowerScale OneFSall versionscert_bundDEcpe:/a:dell:powerscale_onefs:-
F5 BIG-IP 15.1.0-15.1.10all versionscert_bundDEcpe:/a:f5:big-ip:15.1.0_-_15.1.10
F5 BIG-IP 16.1.0-16.1.6all versionscert_bundDEcpe:/a:f5:big-ip:16.1.0_-_16.1.6
F5 BIG-IP 17.1.0-17.1.2all versionscert_bundDEcpe:/a:f5:big-ip:17.1.0_-_17.1.2
F5 BIG-IP 17.5.0-17.5.1all versionscert_bundDEcpe:/a:f5:big-ip:17.5.0_-_17.5.1
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
IBM Business Automation Workflowall versionscert_bundDEcpe:/a:ibm:business_automation_workflow:-
IBM DevOps Code ClearCase 11.0all versionscert_bundDEcpe:/a:ibm:devops_code_clearcase:11.0
IBM Power Hardware Management Console V10all versionscert_bundDEcpe:/a:ibm:hardware_management_console:v10
IBM Power Hardware Management Console V10.3.1050.0-V10.3.1064.1all versionscert_bundDEcpe:/a:ibm:hardware_management_console:v10.3.1050.0_-_v10.3.1064.1
IBM Power Hardware Management Console V11.1.1110.0-V11.1.1112.1all versionscert_bundDEcpe:/a:ibm:hardware_management_console:v11.1.1110.0_-_v11.1.1112.1
IBM Rational ClearCaseall versionscert_bundDEcpe:/a:ibm:rational_clearcase:-
IBM Rational ClearCase 10.0.0all versionscert_bundDEcpe:/a:ibm:rational_clearcase:10.0.0
IBM Rational ClearCase 9.1all versionscert_bundDEcpe:/a:ibm:rational_clearcase:9.1

showing 20 of 72

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1529Apache HTTP Server: Mehrere SchwachstellenDeutsch2025-07-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache HTTP Server ausnutzen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um Dateien zu manipulieren.
WID-SEC-W-2025-1850Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2025-08-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
BIT-apache-2025-53020Apache HTTP Server: HTTP/2 DoS by Memory Increase2025-07-16vendor · osvUS
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.
JVNDB-2026-003910JVN iPedia advisory JVNDB-2026-0039102026-02-17vendor · jvndbJP

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund osv jvndb NVD CVE.org MITRE

published 2025-07-10modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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