CVE-2025-11123Public exploitNetwork attack vector

Authenticated memory corruption via unbounded QoS setting

Published Sep 28, 2025 · Updated Sep 28, 2025

Stack-based buffer overflow in Tenda AC18 15.03.05.19 allows remote authenticated users to corrupt memory via a crafted HTTP POST request. The saveAutoQos handler stores the unbounded enable parameter in qos.auto.en, and getAdvanceStatus retrieves it without a length check. Low-privilege access to the management interface is required, and the public proof of concept does not demonstrate code execution or in-the-wild use.

CVSS severity8.8
High
EPSS probability0.80%
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 AC18 15.03.05.19 allows remote authenticated users to corrupt memory via a crafted HTTP POST request. The saveAutoQos handler stores the unbounded enable parameter in qos.auto.en, and getAdvanceStatus retrieves it without a length check. Low-privilege access to the management interface is required, and the public proof of concept does not demonstrate code execution or in-the-wild use.

The record

CVE
CVE-2025-11123
Published
Sep 28, 2025
Updated
Sep 28, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC18
Classifications
CWE-121, CWE-119
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.

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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

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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