CVE-2025-25280Network attack vector

Unauthenticated device reboot via crafted request

Published Mar 3, 2025 · Updated Mar 3, 2025

Buffer overflow in Century Systems FutureNet AS and FA firmware allows remote attackers to reboot devices with crafted requests. Century Systems has not disclosed the affected request field or the buffer operation that fails to bound untrusted input. No authentication or user interaction is required, but AS-series exposure from the WAN requires publishing the web-server port through NAT; a successful request interrupts service by rebooting the appliance.

CVSS severity5.3
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Century Systems FutureNet AS and FA firmware allows remote attackers to reboot devices with crafted requests. Century Systems has not disclosed the affected request field or the buffer operation that fails to bound untrusted input. No authentication or user interaction is required, but AS-series exposure from the WAN requires publishing the web-server port through NAT; a successful request interrupts service by rebooting the appliance.

The record

CVE
CVE-2025-25280
Published
Mar 3, 2025
Updated
Mar 3, 2025
Vendor
CENTURY SYSTEMS Co., Ltd.
Product
FutureNet AS-210/U4
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=firmware Version 2.6.6 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CENTURY SYSTEMS Co., Ltd. · FutureNet AS-210/U4version=firmware Version 2.6.6 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet FA-210version=firmware Version 1.1.9 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/F-KOversion=firmware Version 1.14.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-P250/KLversion=firmware Version 2.6.6 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-P250/NLversion=firmware Version 2.6.6 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-M250/Lversion=firmware Version 3.0.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/Sversion=firmware Version 1.14.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/KLversion=firmware Version 1.14.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet FA-215version=firmware Version 1.0.1 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/NLversion=firmware Version 1.14.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/KL Rev2version=firmware Version 2.6.6 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/Lversion=firmware Version 2.6.6 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-M250/NLversion=firmware Version 3.0.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-M250/KLversion=firmware Version 3.0.0 and earlier
CENTURY SYSTEMS Co., Ltd. · FutureNet AS-250/F-SCversion=firmware Version 1.14.0 and earlier

Published CVSS scores

5.3JPCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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