CVE-2026-11524Public exploitNetwork attack vector

Authenticated service crash via unbounded sprintf

Published Jun 8, 2026 · Updated Jun 8, 2026

Stack-based buffer overflow in Tenda W20E 15.11.0.6 allows remote authenticated users to crash the web service via a crafted Wi-Fi filter remark. The modifyWifiFilterRules handler passes the user-controlled wifiFilterListRemark value to sprintf while building a configuration string without enforcing its destination buffer's capacity. Low-privileged management access is required; the published proof of concept delivers 1,000 bytes, while code execution remains unvalidated.

CVSS severity8.8
High
EPSS probability0.47%
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 W20E 15.11.0.6 allows remote authenticated users to crash the web service via a crafted Wi-Fi filter remark. The modifyWifiFilterRules handler passes the user-controlled wifiFilterListRemark value to sprintf while building a configuration string without enforcing its destination buffer's capacity. Low-privileged management access is required; the published proof of concept delivers 1,000 bytes, while code execution remains unvalidated.

The record

CVE
CVE-2026-11524
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
W20E
Classifications
CWE-121, CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 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=15.11.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · W20Eversion=15.11.0.6

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
T1499.004Application or System Exploitation

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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