CVE-2025-3711Network attack vector

Unauthenticated code execution via stack buffer overflow

Published May 9, 2025 · Updated May 28, 2025

A stack-based buffer overflow in ATEN CL5708IM firmware before 2.2.215 allows unauthenticated remote attackers to execute arbitrary code. The published advisory does not identify the affected input, request handler, or unsafe copy operation that overruns the stack buffer. Network reachability is sufficient, with no credentials or user interaction required; successful exploitation grants code execution on the appliance.

CVSS severity9.3
Critical
EPSS probability1.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack-based buffer overflow in ATEN CL5708IM firmware before 2.2.215 allows unauthenticated remote attackers to execute arbitrary code. The published advisory does not identify the affected input, request handler, or unsafe copy operation that overruns the stack buffer. Network reachability is sufficient, with no credentials or user interaction required; successful exploitation grants code execution on the appliance.

The record

CVE
CVE-2025-3711
Published
May 9, 2025
Updated
May 28, 2025
Vendor
ATEN
Product
CL5708IM
Classifications
CWE-121, CAPEC-100, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=0 <2.2.215

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ATEN · CL5708IMversion=0 <2.2.215

Published CVSS scores

9.8TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3TWCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 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-121Stack-based Buffer Overflow
CAPEC-100Overflow Buffers
T1190Exploit Public-Facing Application

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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