CVE-2023-40802Public exploitNetwork attack vector

Authenticated router crash via unchecked URLs copy

Published Aug 25, 2023 · Updated Oct 2, 2024

Heap overflow in Tenda AC23 16.03.07.45_cn allows remote authenticated users to crash the router via a crafted parental-control request. The get_parentControl_list_Info function copies the user-controlled urls parameter with strcpy into heap space allocated by saveParentControlInfo without checking its length. A valid management session and network access to the web interface are required, and the demonstrated consequence is a router-service crash.

CVSS severity6.5
Medium
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap overflow in Tenda AC23 16.03.07.45_cn allows remote authenticated users to crash the router via a crafted parental-control request. The get_parentControl_list_Info function copies the user-controlled urls parameter with strcpy into heap space allocated by saveParentControlInfo without checking its length. A valid management session and network access to the web interface are required, and the demonstrated consequence is a router-service crash.

The record

CVE
CVE-2023-40802
Published
Aug 25, 2023
Updated
Oct 2, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC23
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
authenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 privilegesauthenticated

What is affected?

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

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo