CVE-2026-5613Public exploitNetwork attack vector

Authenticated code execution via unchecked webpage copy

Published Apr 6, 2026 · Updated Apr 6, 2026

Stack-based buffer overflow in Belkin F9K1015 1.00.10 allows remote authenticated users to execute code through a crafted webpage parameter. The formReboot handler at /goform/formReboot passes the user-controlled webpage value through strcpy into the fixed-size stack buffer ok_msg without a length check. Low-privilege web-interface access is required, and a crafted POST request can crash the device or execute code in the web service context.

CVSS severity8.8
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Belkin F9K1015 1.00.10 allows remote authenticated users to execute code through a crafted webpage parameter. The formReboot handler at /goform/formReboot passes the user-controlled webpage value through strcpy into the fixed-size stack buffer ok_msg without a length check. Low-privilege web-interface access is required, and a crafted POST request can crash the device or execute code in the web service context.

The record

CVE
CVE-2026-5613
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Belkin
Product
F9K1015
Classifications
CWE-119, CWE-121, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 2026Record 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

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
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C

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-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

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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