What is the CVSS score of CVE-2026-24103?

CVE-2026-24103 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2026-24103?

Yes, a public proof-of-concept exploit is available for CVE-2026-24103. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-24103?

Within 24 hours: Inventory all Tenda AC15V1.0 devices running V15.03.05.18_multi firmware and isolate affected units from production networks if business-critical. Within 7 days: Implement network segmentation to restrict admin access to these devices, disable the goform/formSetMacFilterCfg function via firewall rules if accessible remotely, and block external access to affected devices. Within 30 days: Replace vulnerable Tenda AC15 units with patched alternatives from vendors with confirmed security updates, or retire devices if replacement is not feasible.

Ac15 Firmware CVE-2026-24103

CRITICAL

Classic Buffer Overflow (CWE-120)

2026-03-03 cve@mitre.org

Buffer Overflow Tenda Ac15 Firmware

9.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

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

Access

Send crafted HTTP POST request to goform/formSetMacFilterCfg
Exploit

Trigger buffer overflow in MAC filter configuration parser
Impact

Execute arbitrary code with device privileges

Vulnerability Assessment

Weakness	CWE CWE-120 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Buffer copy size validation MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list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	No special conditions — remote unauthenticated exploitation against Tenda AC15V1.0 running firmware V15.03.05.18_multi with default web interface enabled on port 80/443.
Impact	CVSS 9.8.
Exploit ScenarioDerived	Overflow via MAC filter configuration.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Buffer overflow in Tenda AC15V1.0 via formSetMacFilterCfg. PoC available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:05 CVSS 9.8

Buffer overflow in Tenda AC15 router.

RemediationAI

Update firmware.

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

CWE-120.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/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

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Mar 05, 2026 - 21:43 vuln.today

Public exploit code

CVE Published

Mar 03, 2026 - 15:16 nvd

CRITICAL 9.8

DescriptionCVE.org

A buffer overflow vulnerability was discovered in goform/formSetMacFilterCfg in Tenda AC15V1.0 V15.03.05.18_multi.

Executive ViewAI

Why It Matters

A critical buffer overflow vulnerability (CVSS 9.8) affects Tenda AC15 routers, allowing unauthenticated remote code execution with no available patch. Organizations using this hardware face immediate risk of complete system compromise, data theft, and network infiltration without urgent mitigation.

Business Impact: Severe

Compensating Controls

Disable remote management interfaces and restrict access to device administration ports (typically 80/443, 8080) using firewall rules and network ACLs. Implement WAF rules to block requests to /goform/formSetMacFilterCfg endpoints. Segment affected routers to isolated networks with no external internet access. Monitor for suspicious traffic patterns and exploitation attempts. Upgrade to alternative router firmware or hardware from vendors with active security support.

Threat Intelligence Overview

EPSS Score

0.1%

Top 84% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

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 CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

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

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

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.