CVE-2023-0782Public exploitNetwork attack vector

Authenticated code execution via DDNS stack overflow

Published Feb 11, 2023 · Updated Mar 24, 2025

Stack-based buffer overflow in Tenda AC23 16.03.07.45 allows remote authenticated users to execute code via crafted DDNS requests. formSetSysToolDDNS stores the ddnsEn POST value in adv.ddns1.en, and formGetSysToolDDNS copies up to 0x5DC bytes from that NVRAM value into a smaller stack buffer. Administrative web access is required; successful exploitation can crash the router or yield a root shell.

CVSS severity9.8
Critical
EPSS probability1.47%
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 AC23 16.03.07.45 allows remote authenticated users to execute code via crafted DDNS requests. formSetSysToolDDNS stores the ddnsEn POST value in adv.ddns1.en, and formGetSysToolDDNS copies up to 0x5DC bytes from that NVRAM value into a smaller stack buffer. Administrative web access is required; successful exploitation can crash the router or yield a root shell.

The record

CVE
CVE-2023-0782
Published
Feb 11, 2023
Updated
Mar 24, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC23
Classifications
CWE-787, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2025Record 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=16.03.07.45

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC23version=16.03.07.45

Published CVSS scores

7.2VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.3VulDBAV:N/AC:L/Au:M/C:C/I:C/A:C
9.8NIST NVDCVSS: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
Privilegesadmin
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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