CVE-2025-11121Public exploitNetwork attack vector

Authenticated command execution via unfiltered lanIp

Published Sep 28, 2025 · Updated Sep 28, 2025

Command injection in Tenda AC18 15.03.05.19 allows remote authenticated users to execute OS commands through a crafted lanIp value. AdvSetLanip passes the POST lanIp value to SetValue as lan.ip without neutralizing command separators, and /goform/telnet later retrieves that value in the command path. Low-privileged management access is required; successful exploitation executes attacker-selected commands, including a demonstrated router reboot.

CVSS severity8.8
High
EPSS probability3.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Tenda AC18 15.03.05.19 allows remote authenticated users to execute OS commands through a crafted lanIp value. AdvSetLanip passes the POST lanIp value to SetValue as lan.ip without neutralizing command separators, and /goform/telnet later retrieves that value in the command path. Low-privileged management access is required; successful exploitation executes attacker-selected commands, including a demonstrated router reboot.

The record

CVE
CVE-2025-11121
Published
Sep 28, 2025
Updated
Sep 28, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC18
Classifications
CWE-74, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2025Record 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=15.03.05.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC18version=15.03.05.19

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix 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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