CVE-2026-8259Public exploitNetwork attack vector

Authenticated command execution via unsanitized lan.ip parameter

Published May 11, 2026 · Updated May 11, 2026

OS command injection in Tenda AC6 2.0 firmware 15.03.06.23 allows remote authenticated users to execute commands via its web interface. The TendaTelnet handler in /bin/httpd inserts the lan.ip form value into telnetd -b %s & through doSystemCmd(), which invokes system without sanitization. A valid web-management session is required, and injected shell metacharacters run arbitrary commands with the router's httpd privileges.

CVSS severity4.7
Medium
EPSS probability4.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Tenda AC6 2.0 firmware 15.03.06.23 allows remote authenticated users to execute commands via its web interface. The TendaTelnet handler in /bin/httpd inserts the lan.ip form value into telnetd -b %s & through doSystemCmd(), which invokes system without sanitization. A valid web-management session is required, and injected shell metacharacters run arbitrary commands with the router's httpd privileges.

The record

CVE
CVE-2026-8259
Published
May 11, 2026
Updated
May 11, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC6
Classifications
CWE-78, CWE-77, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=15.03.06.23
  2. Affected versionversion=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC6version=15.03.06.23; version=2.0

Published CVSS scores

2.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
5.8VulDBAV:N/AC:L/Au:M/C:P/I:P/A: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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

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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