CVE-2023-39828Public exploitNetwork attack vector

Device crash via unchecked security parameter copy

Published Aug 14, 2023 · Updated Oct 9, 2024

Stack overflow in formWifiBasicSet in Tenda A18 15.13.07.09 allows remote attackers to crash the device via a crafted security parameter. The handler accepts the security form value without a length check and passes it to strcpy, which copies it into the fixed-size param stack buffer. Exploitation requires network access to the appliance's web management endpoint and can crash its service, interrupting extender availability.

CVSS severity7.5
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in formWifiBasicSet in Tenda A18 15.13.07.09 allows remote attackers to crash the device via a crafted security parameter. The handler accepts the security form value without a length check and passes it to strcpy, which copies it into the fixed-size param stack buffer. Exploitation requires network access to the appliance's web management endpoint and can crash its service, interrupting extender availability.

The record

CVE
CVE-2023-39828
Published
Aug 14, 2023
Updated
Oct 9, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
A18
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2024Record 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=v15.13.07.09

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · A18version=v15.13.07.09

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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