CVE-2026-10191Public exploitNetwork attack vector

Authenticated device crash via oversized MAC field

Published May 31, 2026 · Updated May 31, 2026

Stack-based buffer overflow in Tenda W12 3.0.0.7(4763) allows remote authenticated users to crash the device via a crafted request. The cgiWifiMacFilterSet handler in /bin/httpd copies a wifiMacFilterSet.macList.mac value longer than 512 bytes into the fixed WifiMacList stack buffer, overwriting adjacent data. A low-privilege authenticated session can reach the JSON parser; the demonstrated consequence is a device crash, while code execution remains unproven.

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 Tenda W12 3.0.0.7(4763) allows remote authenticated users to crash the device via a crafted request. The cgiWifiMacFilterSet handler in /bin/httpd copies a wifiMacFilterSet.macList.mac value longer than 512 bytes into the fixed WifiMacList stack buffer, overwriting adjacent data. A low-privilege authenticated session can reach the JSON parser; the demonstrated consequence is a device crash, while code execution remains unproven.

The record

CVE
CVE-2026-10191
Published
May 31, 2026
Updated
May 31, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
W12
Classifications
CWE-119, CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 31, 2026CVE publishedPublication date reported by the CVE source.
  2. May 31, 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=3.0.0.7(4763)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · W12version=3.0.0.7(4763)

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.

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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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based 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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