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CVE-2020-24987

CRITICAL
9.8
CVSS Score
Published: September 4, 2020 at 07:24 PM UTC
Updated: June 17, 2026 at 03:06 AM UTC
2 products affected across 1 vendorAC18 FirmwareAc18

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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%

Description

Tenda AC18 Router through V15.03.05.05_EN and through V15.03.05.19(6318) CN devices could cause a remote code execution due to incorrect authentication handling of vulnerable logincheck() function in /usr/lib/lua/ngx_authserver/ngx_wdas.lua file if the administrator UI Interface is set to "radius".

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

AC18 Firmware· Tendacn
95%
v ≤ v15.03.05.05_env ≤ v15.03.05.19(6318)_cn
tendacn-ac18 (same device)
Ac18· Tendacndevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://cwe.mitre.org/data/definitions/287.html
x_refsource_MISCBroken Link
Source: [email protected]
https://drive.google.com/file/d/1iqpr0EofOBC6kCq2USTOBPRlJu_naFjQ/view?usp=sharing
x_refsource_MISCProductVendor Advisory
Source: [email protected]
https://www.tendacn.com/en/product/AC18.html

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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