What is the CVSS score of CVE-2026-30140?

CVE-2026-30140 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-30140?

Within 24 hours: Inventory all Tenda W15E devices running affected firmware version and isolate them from critical network segments. Within 7 days: Implement network segmentation and restrict administrative access through firewall rules; monitor device logs for unauthorized access attempts. Within 30 days: Monitor Tenda for patch availability and establish a deployment timeline; evaluate replacement with alternative vendors if patches remain unavailable.

W15e Firmware CVE-2026-30140

HIGH

Improper Access Control (CWE-284)

2026-03-09 cve@mitre.org

Authentication Bypass Information Disclosure Tenda W15e Firmware

7.5

CVSS 3.1 · NVD

View

Attack ChainAIDerived

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

Access

Send HTTP GET request to /cgi-bin/DownloadCfg/RouterCfm.jpg
Exploit

Download configuration file with plaintext credentials
Execution

Extract administrator username and password
Impact

Authenticate to management interface

Vulnerability Assessment

Weakness	CWE CWE-284 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Access control enforcement MITRE ATT&CK 1 technique across 1 tactic: Defense Evasion 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 W15E V02.03.01.26_cn with /cgi-bin/DownloadCfg/RouterCfm.jpg endpoint accessible without authentication. No special conditions — remote unauthenticated exploitation against default-configured Tenda W15E routers.
Impact	CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitation no authentication required. Exploitable via remote/network.
Exploit ScenarioDerived	A remote attacker without authentication could exploit this flaw, sensitive information disclosure and potential remote admini.

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

An incorrect access control vulnerability exists in Tenda W15E V02.03.01.26_cn. [CVSS 7.5 HIGH]

RemediationAI

Monitor vendor advisories for a patch. 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-284 (Improper Access Control). An incorrect access control vulnerability exists in Tenda W15E V02.03.01.26_cn. An unauthenticated attacker can access the /cgi-bin/DownloadCfg/RouterCfm.jpg endpoint to download the configuration file containing plaintext administrator credentials, leading to sensitive information disclosure and potential remote administrative access.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

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

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

None

Availability

None

DescriptionCVE.org

An incorrect access control vulnerability exists in Tenda W15E V02.03.01.26_cn. An unauthenticated attacker can access the /cgi-bin/DownloadCfg/RouterCfm.jpg endpoint to download the configuration file containing plaintext administrator credentials, leading to sensitive information disclosure and potential remote administrative access.

Executive ViewAI

Why It Matters

A high-severity access control flaw in Tenda W15E wireless devices (v02.03.01.26_cn) allows unauthorized users to bypass authentication and access sensitive functions. Organizations deploying these devices face immediate risk of unauthorized network access, data exposure, and potential lateral movement within their infrastructure.

Business Impact: High

Compensating Controls

Network segmentation to isolate affected devices; firewall rules restricting administrative interface access to trusted IPs only; disable remote management features where feasible; implement network access controls (NAC) to limit device lateral movement; increase logging and monitoring for unauthorized access attempts; consider temporary replacement with patched alternative devices for critical deployments.

Threat Intelligence Overview

EPSS Score

0.0%

Top 87% exploitable

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 HIGH

CISA KEV No

Public POC No

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

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.