CVE-2026-10158Public exploitNetwork attack vector

Authenticated code execution via unbounded server_name copy

Published May 31, 2026 · Updated May 31, 2026

Stack-based buffer overflow in TRENDnet TEW-432BRP 3.10B20 allows remote authenticated users to crash the router via server_name. The boa web server's formPortFw handler copies the unbounded server_name value from a POST to /goform/formPortFw into a stack local, overwriting the return address. Valid HTTP Basic credentials are required; the published proof of concept causes a persistent service interruption, while return-address control supports arbitrary code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.46%
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-432BRP 3.10B20 allows remote authenticated users to crash the router via server_name. The boa web server's formPortFw handler copies the unbounded server_name value from a POST to /goform/formPortFw into a stack local, overwriting the return address. Valid HTTP Basic credentials are required; the published proof of concept causes a persistent service interruption, while return-address control supports arbitrary code execution.

The record

CVE
CVE-2026-10158
Published
May 31, 2026
Updated
May 31, 2026
Vendor
TRENDnet
Product
TEW-432BRP
Classifications
CWE-119, CWE-121, T1190, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 31, 2026CVE publishedPublication date reported by the CVE source.
  2. May 31, 2026Record 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=3.10B20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TRENDnet · TEW-432BRPversion=3.10B20

Published CVSS scores

9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
8.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.7VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.8VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application
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

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Your stack

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