CVE-2022-40869Public exploitNetwork attack vector

Authenticated code execution via unchecked DHCP list copy

Published Sep 23, 2022 · Updated May 27, 2025

Stack overflow in fromDhcpListClient in Tenda AC15 15.03.05.19 and AC18 15.03.05.19 allows remote authenticated users to execute code. The handler copies an attacker-controlled list* value with strcpy into a 257-byte stack buffer without checking its length. Administrative access to the router web interface is required; crafted overflow data can instead crash the device.

CVSS severity9.8
Critical
EPSS probability1.24%
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 fromDhcpListClient in Tenda AC15 15.03.05.19 and AC18 15.03.05.19 allows remote authenticated users to execute code. The handler copies an attacker-controlled list* value with strcpy into a 257-byte stack buffer without checking its length. Administrative access to the router web interface is required; crafted overflow data can instead crash the device.

The record

CVE
CVE-2022-40869
Published
Sep 23, 2022
Updated
May 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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

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
T1210Exploitation of Remote Services

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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