CVE Tools
Sign in

CVE-2025-53020

Apache HTTP Server: HTTP/2 DoS by Memory Increase

Published: Jul 10, 2025Updated: Nov 4, 2025 Sources: CVE List NVD BDUCWE-401
7.5HIGH
NVD MITRE
EPSS Score
4.8%
Top 8.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-401

Affected Products

ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Astra Linux Common EditionOn-premOS
Operating Systems / linux-distro
apache
oss-project·USaka apache http server, apache httpd
http serverOn-premWeb App
Networking Infrastructure / load-balancer-proxy
Apache Software Foundation
oss-project·USaka apache foundation
Apache HTTP ServerOn-premWeb App
Networking Infrastructure / load-balancer-proxy
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
Альт 8 СПOn-premOS
Operating Systems / linux-distro
АО «СберТех»
commercial·RUaka ao sbertech, сбертех
Platform V SberLinux OS ServerOn-premOS
Operating Systems / linux-distro
and 2 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2025-53020?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://httpd.apache.org/security/vulnerabilities_24.html
httpd.apache.org
http://www.openwall.com/lists/oss-security/2025/07/10/10
openwall.com
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html
lists.debian.org
and 9 more references View all →
News mentions
1

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-53020 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows