CVE-2026-11504Public exploitNetwork attack vector

Authenticated service crash via unbounded schedule copies

Published Jun 8, 2026 · Updated Jun 8, 2026

Heap buffer overflow in Tenda CX12L 16.03.53.12 allows remote authenticated users to crash the management service via schedule times. setSchedWifi allocates 25 bytes, then uses unbounded strcpy operations to copy attacker-controlled schedStartTime and schedEndTime values at fixed offsets. Management access is required; the published proof of concept demonstrates an HTTP-service crash, while code execution remains unverified.

CVSS severityUnavailable
Unscored
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

Heap buffer overflow in Tenda CX12L 16.03.53.12 allows remote authenticated users to crash the management service via schedule times. setSchedWifi allocates 25 bytes, then uses unbounded strcpy operations to copy attacker-controlled schedStartTime and schedEndTime values at fixed offsets. Management access is required; the published proof of concept demonstrates an HTTP-service crash, while code execution remains unverified.

The record

CVE
CVE-2026-11504
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
CX12L
Classifications
CWE-119, CWE-121, 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=16.03.53.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · CX12Lversion=16.03.53.12

Published CVSS scores

8.8VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.7VulDBCVSS: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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Memory Corruption
CWE-121Stack-based Buffer Overflow
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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