CVE-2025-11299Public exploitNetwork attack vectorHinoki check available

Service crash via unchecked PPP username append

Published Oct 5, 2025 · Updated Oct 5, 2025

Stack-based buffer overflow in Belkin F9K1015 1.00.10 allows remote authenticated users to crash the web service via a crafted WAN request. The formWanTcpipSetup handler appends the POST pppUserName value to the _script_document_1 stack buffer with strcat and no length check. Low-privilege web-interface access is required; an oversized value corrupts memory, while code execution has not been demonstrated.

CVSS severity8.8
High
EPSS probability1.12%
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 crash the web service via a crafted WAN request. The formWanTcpipSetup handler appends the POST pppUserName value to the _script_document_1 stack buffer with strcat and no length check. Low-privilege web-interface access is required; an oversized value corrupts memory, while code execution has not been demonstrated.

The record

CVE
CVE-2025-11299
Published
Oct 5, 2025
Updated
Oct 5, 2025
Vendor
Belkin
Product
F9K1015
Classifications
CWE-119, CWE-120, 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

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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