CVE-2022-40861Public exploitNetwork attack vector

Authenticated code execution via unchecked list copy

Published Sep 23, 2022 · Updated May 22, 2025

Stack overflow in Tenda AC18 firmware 15.03.05.19 allows remote authenticated users to execute code or crash the router via a crafted list parameter. The SetNetControlList handler passes the list value through formSetQosBand into FUN_0007db78, where strcpy copies it into a 256-byte stack buffer without checking its length. Administrator credentials are required; overflowing the buffer can execute code or interrupt service by crashing the router.

CVSS severity7.2
High
EPSS probability1.00%
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 Tenda AC18 firmware 15.03.05.19 allows remote authenticated users to execute code or crash the router via a crafted list parameter. The SetNetControlList handler passes the list value through formSetQosBand into FUN_0007db78, where strcpy copies it into a 256-byte stack buffer without checking its length. Administrator credentials are required; overflowing the buffer can execute code or interrupt service by crashing the router.

The record

CVE
CVE-2022-40861
Published
Sep 23, 2022
Updated
May 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. May 22, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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