What is the CVSS score of CVE-2026-4172?

CVE-2026-4172 has a CVSS 4.0 base score of 7.3 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-4172?

Yes, a public proof-of-concept exploit is available for CVE-2026-4172. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-4172?

Within 24 hours: Inventory all TRENDnet TEW-632BRP devices in your environment and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict access to the HTTP POST endpoint on port 80/443, disable remote management features, and monitor for exploitation attempts. Within 30 days: Evaluate replacement options with supported vendor alternatives and develop a migration plan to phase out all vulnerable TEW-632BRP devices.

Tew 632brp CVE-2026-4172

EUVD-2026-12218 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-03-15 VulDB

Buffer Overflow Stack Overflow Tew 632brp Trendnet

7.3

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send HTTP POST request to /ping_response.cgi
Exploit

Inject oversized ping_ipaddr parameter
Execution

Overflow stack buffer
Impact

Execute arbitrary code on router

Vulnerability Assessment

Weakness	CWE CWE-121 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Stack buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	TRENDnet TEW-632BRP firmware version 1.010B32 with HTTP POST request handler enabled. Requires authenticated access with high privileges (PR:H). Remote attacker must have administrative credentials or access to management interface.
Impact	Despite the high CVSS score of 7.2, the real-world risk is moderated by several factors. The CVSS vector (AV:N/AC:L/PR:H/UI:N/S:U) indicates remote exploitation is possible but requires high privileges, suggesting authentication is needed. The exploitation code maturity is 'Proof-of-Concept' (E:P) with a remediation level of 'X' (undefined). While a public POC exists on GitHub, the lack of CISA KEV listing suggests no known active exploitation in the wild. No EPSS score is available to assess exploitation likelihood. The vendor's non-response to disclosure is concerning, indicating no patch is available. This presents moderate risk for organizations using affected devices, especially if administrative credentials are weak or compromised.
Exploit ScenarioDerived	An attacker who has obtained valid administrative credentials (through phishing, credential stuffing, or default passwords) can remotely access the router's web interface and send a specially crafted HTTP POST request to /ping_response.cgi. By providing an oversized value in the ping_ipaddr parameter, the attacker triggers a stack buffer overflow, potentially gaining code execution on the device. The public POC available at https://github.com/i-Corner/cve/issues/40 demonstrates this attack. Given the low attack complexity (AC:L) and network attack vector (AV:N), exploitation is straightforward once authentication is bypassed.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

Stack-based buffer overflow vulnerability in TRENDnet TEW-632BRP firmware version 1.010B32, specifically in the ping_response.cgi file's HTTP POST request handler. An authenticated attacker with high privileges can exploit this vulnerability remotely to achieve code execution with high impact to confidentiality, integrity, and availability. A public proof-of-concept exploit is available on GitHub, though the vulnerability is not listed in CISA KEV and no EPSS score is provided.

RemediationAI

No official patch or firmware update is available as the vendor did not respond to the vulnerability disclosure. Recommended mitigations include: 1) Replace affected TEW-632BRP devices with newer, supported models; 2) Restrict administrative access to trusted IP addresses only; 3) Use strong, unique administrative credentials; 4) Disable remote administration if not required; 5) Place the device behind a properly configured firewall to limit exposure. Monitor VulDB (ID: 351079) for any future vendor response or patch availability.

Affected VersionsENISA

TEW-632BRP 1.010B32

Affected Packages

euvd tew_632brp no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability affects TRENDnet's TEW-632BRP wireless router (CPE: cpe:2.3:a:trendnet:tew-632brp:*:*:*:*:*:*:*:*) running firmware version 1.010B32. The root cause is CWE-121 (Stack-based Buffer Overflow), where the ping_ipaddr parameter in /ping_response.cgi is not properly validated before being copied to a fixed-size stack buffer. This is a classic memory corruption issue in embedded device web interfaces, where user-supplied input to diagnostic utilities (ping functionality) is not sanitized, allowing an attacker to overwrite the stack and potentially execute arbitrary code.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.3 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

High

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

High

Vulnerable system: Availability

High

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

CVSS changed

Apr 22, 2026 - 21:37 NVD

7.2 (HIGH) 7.3 (HIGH)

PoC Detected

Mar 16, 2026 - 14:53 vuln.today

Public exploit code

CVE Published

Mar 15, 2026 - 08:32 nvd

HIGH 7.2

DescriptionCVE.org

A vulnerability was detected in TRENDnet TEW-632BRP 1.010B32. This affects an unknown part of the file /ping_response.cgi of the component HTTP POST Request Handler. The manipulation of the argument ping_ipaddr results in stack-based buffer overflow. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Executive ViewAI

Why It Matters

A publicly exploitable remote code execution vulnerability affects TRENDnet TEW-632BRP routers with no available patch from the vendor. Organizations using this device model face immediate risk of unauthorized access, data theft, and network compromise, particularly concerning for businesses relying on this equipment for network perimeter security.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to block POST requests to /ping_response.cgi with suspicious ping_ipaddr parameters; disable HTTP/HTTPS management interfaces and restrict administrative access to trusted IP ranges only; segment affected routers behind additional network boundaries; disable ICMP ping functionality if operationally feasible; monitor firewall logs for exploitation attempts; consider implementing network intrusion detection signatures for this CVE.

Threat Intelligence Overview

EPSS Score

0.0%

Top 89% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +36

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Stack-based Buffer Overflow HIGH

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.