CVE-2022-44366Public exploitNetwork attack vector

Device crash via unchecked cmd parameter copy

Published Dec 2, 2022 · Updated Apr 24, 2025

Heap buffer overflow in Tenda i21 firmware 1.0.0.14(4656) allows remote attackers to crash the device with a crafted HTTP request. The /goform/setDiagnoseInfo handler copies the cmd parameter after its five-byte prefix into a 0x50-byte heap buffer with strcpy without checking its length. The HTTP endpoint is network-reachable without reported user interaction, and the published proof of concept demonstrates a service-interrupting crash.

CVSS severity9.8
Critical
EPSS probability9.86%
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 buffer overflow in Tenda i21 firmware 1.0.0.14(4656) allows remote attackers to crash the device with a crafted HTTP request. The /goform/setDiagnoseInfo handler copies the cmd parameter after its five-byte prefix into a 0x50-byte heap buffer with strcpy without checking its length. The HTTP endpoint is network-reachable without reported user interaction, and the published proof of concept demonstrates a service-interrupting crash.

The record

CVE
CVE-2022-44366
Published
Dec 2, 2022
Updated
Apr 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2025Record 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?

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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499.004Application 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