CVE-2022-40942Public exploitNetwork attack vector

Unauthenticated memory corruption via parental-control time overflow

Published Sep 28, 2022 · Updated May 21, 2025

Stack overflow in compare_parentcontrol_time in Tenda TX3 firmware 16.03.13.11 allows remote attackers to corrupt process memory. The function processes attacker-controlled parental-control time data with an out-of-bounds stack write, but the public report does not identify the exact copied field or unsafe primitive. No authentication or user interaction is required, and exploitation can corrupt router process state or interrupt the affected service.

CVSS severity9.8
Critical
EPSS probability8.15%
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 compare_parentcontrol_time in Tenda TX3 firmware 16.03.13.11 allows remote attackers to corrupt process memory. The function processes attacker-controlled parental-control time data with an out-of-bounds stack write, but the public report does not identify the exact copied field or unsafe primitive. No authentication or user interaction is required, and exploitation can corrupt router process state or interrupt the affected service.

The record

CVE
CVE-2022-40942
Published
Sep 28, 2022
Updated
May 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 28, 2022CVE publishedPublication date reported by the CVE source.
  2. May 21, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS: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
Privilegesunauthenticated
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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