What is the CVSS score of CVE-2026-3811?

CVE-2026-3811 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: 0.1%.

Is there a public PoC exploit available for CVE-2026-3811?

Yes, a public proof-of-concept exploit is available for CVE-2026-3811. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3811?

Within 24 hours: Identify and inventory all Tenda FH1202 devices in your environment and their network criticality. Within 7 days: Isolate or segment affected routers from sensitive network resources; implement enhanced monitoring on these devices; contact Tenda for patch timeline and interim guidance. Within 30 days: Replace vulnerable devices with alternative vendors' equipment or implement strict WAF/IDS rules blocking exploitation attempts; verify no unauthorized access occurred during the interim period.

Fh1202 Firmware CVE-2026-3811

HIGH

Buffer Overflow (CWE-119)

2026-03-09 cna@vuldb.com

Buffer Overflow Stack Overflow Tenda Fh1202 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 FH1202 device
Delivery

Send crafted HTTP request to /goform/P2pListFilter
Exploit

Inject oversized 'page' parameter
Execution

Trigger stack buffer overflow
Impact

Execute arbitrary code with device privileges

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Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution,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 FH1202 firmware version 1.2.0.14(408) with /goform/P2pListFilter endpoint accessible. Attacker must possess valid authentication credentials for the device's web interface (PR:L requirement).
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 flaw, stack-based buffer overflow.

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

No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Stack-based buffer overflow in Tenda FH1202 firmware version 1.2.0.14(408) allows authenticated remote attackers to achieve complete system compromise through a malformed page parameter in the /goform/P2pListFilter endpoint. Public exploit code exists for this vulnerability, and no patch is currently available, leaving affected devices at immediate risk of code execution and data theft.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:56 CVSS 8.8

A vulnerability was found in Tenda FH1202 1.2.0.14(408). This impacts the function fromP2pListFilter of the file /goform/P2pListFilter. [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 Fh1202 Firmware. A vulnerability was found in Tenda FH1202 1.2.0.14(408). This impacts the function fromP2pListFilter of the file /goform/P2pListFilter. The manipulation of the argument page results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.

Know when Fh1202 Firmware gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

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

Mar 09, 2026 - 15:26 vuln.today

Public exploit code

CVE Published

Mar 09, 2026 - 09:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was found in Tenda FH1202 1.2.0.14(408). This impacts the function fromP2pListFilter of the file /goform/P2pListFilter. The manipulation of the argument page results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.

Executive ViewAI

Why It Matters

A high-severity vulnerability in Tenda FH1202 wireless routers (version 1.2.0.14(408)) allows remote attackers to compromise affected devices with a publicly available exploit. Organizations using this router model face immediate risk of network intrusion, data theft, and lateral movement into corporate networks, particularly concerning for remote office deployments or edge network locations.

Business Impact: High

Compensating Controls

Network segmentation - isolate FH1202 devices to guest/untrusted networks only; 2) WAF/IDS rules - block POST requests to /goform/P2pListFilter endpoint; 3) Disable P2P functionality if not operationally required; 4) Implement strict firewall rules limiting administrative access to these devices; 5) Enable enhanced logging and SIEM alerting for traffic patterns involving affected devices; 6) Monitor Tenda security advisories for patch release; 7) Consider temporary device replacement if business-critical; 8) Restrict network access to the device to authorized personnel only via VPN.

Threat Intelligence Overview

EPSS Score

0.1%

Top 77% 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 0.1%

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: +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.