CVE-2022-44363Public exploitNetwork attack vector

Device crash via unbounded SNMP parameter formatting

Published Dec 2, 2022 · Updated Apr 24, 2025

A stack buffer overflow in Tenda i21 firmware 1.0.0.14(4656) allows remote attackers to crash the device via an HTTP POST request. The setSnmpInfo handler passes the user-controlled snmpEn parameter to sprintf without checking the destination buffer size, overwriting stack memory. Network access to the HTTP management service is sufficient; the published proof of concept crashes the router, and the report states that control-flow exploitation can yield a root shell.

CVSS severity9.8
Critical
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack buffer overflow in Tenda i21 firmware 1.0.0.14(4656) allows remote attackers to crash the device via an HTTP POST request. The setSnmpInfo handler passes the user-controlled snmpEn parameter to sprintf without checking the destination buffer size, overwriting stack memory. Network access to the HTTP management service is sufficient; the published proof of concept crashes the router, and the report states that control-flow exploitation can yield a root shell.

The record

CVE
CVE-2022-44363
Published
Dec 2, 2022
Updated
Apr 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
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

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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

9.8CISA-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.

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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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