What is the CVSS score of CVE-2026-3768?

CVE-2026-3768 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-2026-3768?

Yes, a public proof-of-concept exploit is available for CVE-2026-3768. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3768?

Within 24 hours: Inventory all Tenda F453 1.0.0.3 devices in your environment and isolate affected units from critical network segments if possible. Within 7 days: Implement network-level compensating controls including WAF rules to restrict access to /goform/WrlExtraSet endpoints and disable remote management features. Within 30 days: Evaluate replacement with patched router models or alternative vendors; contact Tenda for patch availability status and timeline.

F453 Firmware CVE-2026-3768

HIGH

Buffer Overflow (CWE-119)

2026-03-08 cna@vuldb.com

Buffer Overflow Golang Stack Overflow Tenda F453 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 F453 device
Delivery

Send crafted POST request to /goform/WrlExtraSet
Exploit

Inject oversized GO 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Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution,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 F453 firmware version 1.0.0.3, valid user credentials required for authentication to the administrative interface at /goform/WrlExtraSet endpoint.
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)

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AnalysisAIv1 – Mar 12, 2026

Stack-based buffer overflow in Tenda F453 firmware version 1.0.0.3 allows authenticated remote attackers to achieve complete system compromise through a malformed GO parameter in the WrlExtraSet function. Public exploit code exists for this vulnerability, and no patch is currently available. Affected systems face high risk of unauthorized code execution, data theft, and service disruption.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 8.8

A security vulnerability has been detected in Tenda F453 1.0.0.3. Affected by this vulnerability is the function formWrlExtraSet of the file /goform/WrlExtraSet. [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 F453 Firmware. A security vulnerability has been detected in Tenda F453 1.0.0.3. Affected by this vulnerability is the function formWrlExtraSet of the file /goform/WrlExtraSet. The manipulation of the argument GO leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly 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

Mar 09, 2026 - 15:17 vuln.today

Public exploit code

CVE Published

Mar 08, 2026 - 21:15 nvd

HIGH 8.8

DescriptionCVE.org

A security vulnerability has been detected in Tenda F453 1.0.0.3. Affected by this vulnerability is the function formWrlExtraSet of the file /goform/WrlExtraSet. The manipulation of the argument GO leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

Executive ViewAI

Why It Matters

A critical vulnerability affecting Tenda F453 wireless routers (CVSS 8.8) has been publicly disclosed with working exploits available, but no patch currently exists from the vendor. Organizations using this device model face immediate risk of unauthorized access and potential network compromise, requiring urgent mitigation measures.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to block access to /goform/WrlExtraSet endpoint; restrict administrative access to management interfaces via network segmentation and IP whitelisting; disable remote management features if not operationally required; monitor for exploitation attempts targeting this endpoint; consider isolating affected devices to a separate VLAN with restricted internet access pending vendor patch release.

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.