CVE-2025-11294Public exploitNetwork attack vectorHinoki check available

Authenticated memory corruption via unchecked username concatenation

Published Oct 5, 2025 · Updated Oct 5, 2025

Stack-based buffer overflow in Belkin F9K1015 1.00.10 allows remote authenticated users to corrupt memory through an L2TP username. The formL2TPSetup handler passes the POST parameter L2TPUserName to strcat without checking its length, overflowing the stack buffer _script_document_1. Low-privileged access to the device's web interface is required; the public proof of concept demonstrates the trigger but not a resulting crash or code execution.

CVSS severity8.8
High
EPSS probability1.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stack-based buffer overflow in Belkin F9K1015 1.00.10 allows remote authenticated users to corrupt memory through an L2TP username. The formL2TPSetup handler passes the POST parameter L2TPUserName to strcat without checking its length, overflowing the stack buffer _script_document_1. Low-privileged access to the device's web interface is required; the public proof of concept demonstrates the trigger but not a resulting crash or code execution.

The record

CVE
CVE-2025-11294
Published
Oct 5, 2025
Updated
Oct 5, 2025
Vendor
Belkin
Product
F9K1015
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 5, 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=1.00.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Belkin · F9K1015version=1.00.10

Published CVSS scores

9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

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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