CVE-2026-10259Public exploitNetwork attack vector

Authenticated code execution via unbounded param copy

Published Jun 1, 2026 · Updated Jun 1, 2026

Stack-based buffer overflow in H3C Magic B0 100R002 and earlier allows remote authenticated users to execute code via a crafted HTTP request. SetMobileAPInfoById in /goform/aspForm copies the param field into a stack buffer without enforcing a length limit. Access to the router's Web management interface and low-privilege authentication are required; exploitation can crash the device or execute arbitrary code.

CVSS severity8.8
High
EPSS probability0.48%
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 H3C Magic B0 100R002 and earlier allows remote authenticated users to execute code via a crafted HTTP request. SetMobileAPInfoById in /goform/aspForm copies the param field into a stack buffer without enforcing a length limit. Access to the router's Web management interface and low-privilege authentication are required; exploitation can crash the device or execute arbitrary code.

The record

CVE
CVE-2026-10259
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
New H3C Technologies Co., Ltd.
Product
H3C Magic B0
Classifications
CWE-121, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 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=100R002

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

New H3C Technologies Co., Ltd. · H3C Magic B0version=100R002

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 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
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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