What is the CVSS score of CVE-2026-2185?

CVE-2026-2185 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-2185?

Yes, a public proof-of-concept exploit is available for CVE-2026-2185. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-2185?

Within 24 hours: Identify all Tenda RX3 devices running firmware 16.03.13.11 and isolate them from production networks or disable remote management access. Within 7 days: Implement network segmentation to restrict access to the affected endpoint (/goform/setBlackRule) and deploy WAF rules to block suspicious requests to this function. Within 30 days: Replace vulnerable Tenda RX3 units with patched alternatives from the vendor or transition to alternative network equipment; monitor Tenda's security advisories for patch availability.

Rx3 Firmware CVE-2026-2185

HIGH

Buffer Overflow (CWE-119)

2026-02-08 cna@vuldb.com

Buffer Overflow Stack Overflow Tenda Rx3 Firmware

8.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

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

Access

Authenticate to Tenda RX3 web interface
Delivery

Send crafted POST to /goform/setBlackRule
Exploit

Inject oversized devName parameter
Execution

Overflow stack buffer
Impact

Execute arbitrary code

Vulnerability Assessment

Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation 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	Tenda RX3 firmware version 16.03.13.11, MAC Filtering Configuration endpoint accessible, authenticated user account required (PR:L), default web interface listening on port 80/443
Impact	CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker could exploit this vulnerability to compromise the affected system.

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 12, 2026

Stack-based buffer overflow in Tenda RX3 firmware 16.03.13.11 MAC filtering endpoint allows authenticated remote attackers to achieve code execution through crafted device name or MAC address parameters. Public exploit code exists for this vulnerability and no patch is currently available. The flaw affects the /goform/setBlackRule component with high impact on confidentiality, integrity, and availability.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 8.8

A flaw has been found in Tenda RX3 16.03.13.11. This issue affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. [CVSS 8.8 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

Classified as CWE-119 (Buffer Overflow). Affects Rx3 Firmware. A flaw has been found in Tenda RX3 16.03.13.11. This issue affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. This manipulation of the argument devName/mac causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been published and may be used.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Feb 10, 2026 - 14:54 vuln.today

Public exploit code

CVE Published

Feb 08, 2026 - 21:15 nvd

HIGH 8.8

DescriptionCVE.org

A flaw has been found in Tenda RX3 16.03.13.11. This issue affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. This manipulation of the argument devName/mac causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been published and may be used.

Executive ViewAI

Why It Matters

Tenda RX3 routers contain a critical remote code execution vulnerability in the MAC filtering configuration endpoint that allows unauthenticated attackers to compromise network infrastructure. Organizations using this router model face immediate risk of network breach, data exfiltration, and potential lateral movement into connected systems, with no vendor patch currently available.

Business Impact: Severe

Compensating Controls

Disable the MAC Filtering Configuration feature entirely if not critical to operations; implement network segmentation isolating affected routers to administrative VLANs only; deploy Web Application Firewall (WAF) rules to block POST requests to /goform/setBlackRule; restrict administrative access to trusted IP ranges only; enable detailed logging and monitoring on affected devices; consider air-gapping the router from untrusted networks until patched.

Threat Intelligence Overview

EPSS Score

0.0%

Top 92% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

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

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

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.