CVE-2023-24099Public exploitNetwork attack vector

Authenticated code execution via oversized wizard username

Published Jan 23, 2023 · Updated Aug 2, 2024

Stack overflow in TRENDnet TEW-820AP firmware 1.01.B01 allows remote authenticated users to execute code via a crafted username. The boa handler for /boafrm/formWizardPassword accepts an arbitrarily long username and stores it under MIB key 182 with apmib_set before later reading it into a bounded buffer. Authentication to the management web interface is required; successful exploitation can take over the device operating system or crash the appliance.

CVSS severity8.8
High
EPSS probability1.04%
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 TRENDnet TEW-820AP firmware 1.01.B01 allows remote authenticated users to execute code via a crafted username. The boa handler for /boafrm/formWizardPassword accepts an arbitrarily long username and stores it under MIB key 182 with apmib_set before later reading it into a bounded buffer. Authentication to the management web interface is required; successful exploitation can take over the device operating system or crash the appliance.

The record

CVE
CVE-2023-24099
Published
Jan 23, 2023
Updated
Aug 2, 2024
Vendor
TRENDnet
Product
TEW-820AP
Classifications
CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.01.b01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TRENDnet · TEW-820APversion=1.01.b01

Published CVSS scores

8.8NISTCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

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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