CVE-2025-11122Public exploitNetwork attack vector

Authenticated router crash via unchecked WAN settings

Published Sep 28, 2025 · Updated Sep 28, 2025

Stack-based buffer overflow in Tenda AC18 15.03.05.19 allows remote authenticated users to crash the router via crafted WAN settings. The WizardHandle handler stores WANT or mtuvalue in wan1.connecttype or wan1.dynamicMTU without length checks, and getAdvanceStatus retrieves the oversized value into stack storage. Low-privileged access to the web management interface is required; successful exploitation corrupts memory and interrupts the router, while code execution has not been demonstrated.

CVSS severity8.8
High
EPSS probability0.80%
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

Stack-based buffer overflow in Tenda AC18 15.03.05.19 allows remote authenticated users to crash the router via crafted WAN settings. The WizardHandle handler stores WANT or mtuvalue in wan1.connecttype or wan1.dynamicMTU without length checks, and getAdvanceStatus retrieves the oversized value into stack storage. Low-privileged access to the web management interface is required; successful exploitation corrupts memory and interrupts the router, while code execution has not been demonstrated.

The record

CVE
CVE-2025-11122
Published
Sep 28, 2025
Updated
Sep 28, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC18
Classifications
CWE-121, CWE-119, T1190
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

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
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 exploitPublished

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

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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