CVE-2022-47065Public exploitNetwork attack vector

Authenticated code execution via unbounded redirect copy

Published Jan 23, 2023 · Updated Aug 3, 2024

Stack-based buffer overflow in TRENDnet TEW-820AP firmware 1.01.B01 allows remote authenticated users to execute arbitrary code. The boa HTTP daemon passes an arbitrarily long submit-url value from /boafrm/formNewSchedule to send_redirect_perm, where sprintf copies it into a stack buffer without a length bound. Access to the device's web interface and its login credentials is required; successful exploitation runs code with the daemon's appliance privileges or crashes the service.

CVSS severity8.8
High
EPSS probability1.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TRENDnet TEW-820AP firmware 1.01.B01 allows remote authenticated users to execute arbitrary code. The boa HTTP daemon passes an arbitrarily long submit-url value from /boafrm/formNewSchedule to send_redirect_perm, where sprintf copies it into a stack buffer without a length bound. Access to the device's web interface and its login credentials is required; successful exploitation runs code with the daemon's appliance privileges or crashes the service.

The record

CVE
CVE-2022-47065
Published
Jan 23, 2023
Updated
Aug 3, 2024
Vendor
TRENDnet
Product
TEW-820AP
Classifications
CWE-121, 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 3, 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

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA ADPCVSS:3.1/AV:A/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
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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