CVE-2026-6134Network attack vector

Authenticated code execution via unchecked qos copy

Published Apr 12, 2026 · Updated Apr 12, 2026

Stack-based buffer overflow in Tenda F451 1.0.0.7_cn_svn7958 allows remote authenticated users to execute code via the qos parameter. The fromqossetting handler for /goform/qossetting passes the user-controlled qos value to strcpy without checking its length, overflowing the stack buffer dest. Access to the web management interface and low privileges are required; exploitation can execute code or crash the router.

CVSS severity8.8
High
EPSS probability0.65%
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 F451 1.0.0.7_cn_svn7958 allows remote authenticated users to execute code via the qos parameter. The fromqossetting handler for /goform/qossetting passes the user-controlled qos value to strcpy without checking its length, overflowing the stack buffer dest. Access to the web management interface and low privileges are required; exploitation can execute code or crash the router.

The record

CVE
CVE-2026-6134
Published
Apr 12, 2026
Updated
Apr 12, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
F451
Classifications
CWE-121, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 12, 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=1.0.0.7_cn_svn7958

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · F451version=1.0.0.7_cn_svn7958

Published CVSS scores

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
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 exploitUnconfirmed

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

No public exploit references are available in this record.

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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