CVE-2026-7079Public exploitNetwork attack vector

Authenticated code execution via unchecked WAN password

Published Apr 27, 2026 · Updated Apr 27, 2026

Buffer overflow in Tenda F456 Firmware 1.0.0.5 allows remote authenticated users to execute code or crash httpd via a crafted WAN request. When wanmode equals 2, fromAdvSetWan passes the user-controlled PPPOEPassword value to sub_3B860 without checking its length, overflowing stack buffer s. Valid web-administration access is required; exploitation executes code in the router context or interrupts its HTTP service.

CVSS severity8.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Buffer overflow in Tenda F456 Firmware 1.0.0.5 allows remote authenticated users to execute code or crash httpd via a crafted WAN request. When wanmode equals 2, fromAdvSetWan passes the user-controlled PPPOEPassword value to sub_3B860 without checking its length, overflowing stack buffer s. Valid web-administration access is required; exploitation executes code in the router context or interrupts its HTTP service.

The record

CVE
CVE-2026-7079
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
F456 Firmware
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 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=1.0.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · F456 Firmwareversion=1.0.0.5

Published CVSS scores

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
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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-120Buffer Copy without Checking Size of Input ('Classic 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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