CVE-2025-44653Network attack vector

Service interruption via unlimited FTP connections

Published Jul 21, 2025 · Updated Jul 5, 2026

Resource exhaustion in H3C GR2200 firmware MiniGR1A0V100R016 allows remote attackers to interrupt service through FTP connections. The USERLIMIT_GLOBAL option in /etc/bftpd.conf is set to 0, so bftpd accepts an unbounded number of simultaneous users instead of enforcing a connection limit. The FTP service must be network-reachable, and enough concurrent unauthenticated sessions exhaust resources and deny service to legitimate users.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in H3C GR2200 firmware MiniGR1A0V100R016 allows remote attackers to interrupt service through FTP connections. The USERLIMIT_GLOBAL option in /etc/bftpd.conf is set to 0, so bftpd accepts an unbounded number of simultaneous users instead of enforcing a connection limit. The FTP service must be network-reachable, and enough concurrent unauthenticated sessions exhaust resources and deny service to legitimate users.

The record

CVE
CVE-2025-44653
Published
Jul 21, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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