What is the CVSS score of CVE-2026-24436?

CVE-2026-24436 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: 0.0%.

Which versions of W30e Firmware are affected by CVE-2026-24436?

Shenzhen Tenda W30E V2 routers are vulnerable to unrestricted brute-force attacks against administrative accounts due to missing rate limiting controls.

How to fix or mitigate CVE-2026-24436?

Within 24 hours: Inventory all Tenda W30E V2 devices and firmware versions in your environment; change all default and administrative credentials to complex, unique passwords; restrict administrative interface access to trusted IP ranges only. Within 7 days: Isolate affected devices to a segmented network if patching is not immediately possible; monitor access logs for brute-force attempts; disable remote management features if not operationally critical. Within 30 days: Develop a device replacement plan; evaluate alternative network equipment; implement network access controls and multi-factor authentication where possible.

W30e Firmware CVE-2026-24436

CRITICAL

Improper Restriction of Excessive Authentication Attempts (CWE-307)

2026-01-26 disclosure@vulncheck.com

Authentication Bypass W30e Firmware

9.8

CVSS 3.1 · NVD

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:00 vuln.today

CVE Published

Jan 26, 2026 - 18:16 nvd

CRITICAL 9.8

DescriptionCVE.org

Shenzhen Tenda W30E V2 firmware versions up to and including V16.01.0.19(5037) do not enforce rate limiting or account lockout mechanisms on authentication endpoints. This allows attackers to perform unrestricted brute-force attempts against administrative credentials.