CVE-2023-40799Public exploitNetwork attack vector

Remote code execution via unchecked security parameter

Published Aug 25, 2023 · Updated Oct 2, 2024

A stack buffer overflow in the Tenda AC23 16.03.07.45_cn web interface allows remote attackers to execute code via a crafted request. The sub_450A4C function copies the user-controlled security or security_5g parameter into a stack buffer with strcpy without checking its length. Network access to the router management interface is sufficient; the published request crashes the service, while a carefully constructed payload obtains a root shell.

CVSS severity9.8
Critical
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack buffer overflow in the Tenda AC23 16.03.07.45_cn web interface allows remote attackers to execute code via a crafted request. The sub_450A4C function copies the user-controlled security or security_5g parameter into a stack buffer with strcpy without checking its length. Network access to the router management interface is sufficient; the published request crashes the service, while a carefully constructed payload obtains a root shell.

The record

CVE
CVE-2023-40799
Published
Aug 25, 2023
Updated
Oct 2, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC23
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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=v16.03.07.45_cn

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC23version=v16.03.07.45_cn

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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