CVE-2025-7087Public exploitNetwork attack vector

Authenticated code execution via unchecked L2TPUserName copy

Published Jul 6, 2025 · Updated Jul 7, 2025

Stack-based overflow in Belkin F9K1122 1.00.33 allows remote authenticated users to execute code via a crafted L2TPUserName. The formL2TPSetup handler copies the unbounded value into a stack local variable, overwriting the function return address. Access to the browser-based management interface is required; the published proof of concept demonstrates a persistent service crash.

CVSS severity8.8
High
EPSS probability10.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based overflow in Belkin F9K1122 1.00.33 allows remote authenticated users to execute code via a crafted L2TPUserName. The formL2TPSetup handler copies the unbounded value into a stack local variable, overwriting the function return address. Access to the browser-based management interface is required; the published proof of concept demonstrates a persistent service crash.

The record

CVE
CVE-2025-7087
Published
Jul 6, 2025
Updated
Jul 7, 2025
Vendor
Belkin
Product
Belkin F9K1122
Classifications
CWE-121, CWE-119, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 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=1.00.33

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Belkin · Belkin F9K1122version=1.00.33

Published CVSS scores

9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 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-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

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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