Cyber Resilience

CVE-2024-31808

Totolink Ex200 Firmware 4.0.3c.7646_b20201211

Public PoC
Published
08 April 2024
Modified
17 June 2026
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0093 57th percentile
Risk Priority 66 floored blend · peak EPSS

Summary

CVE-2024-31808 is a high-severity Improper Handling of Parameters (CWE-233) vulnerability in Totolink Ex200 Firmware. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 43% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the webWlanIdx parameter in the setWebWlanIdx function.

CWE(s)
CWE-233

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-7335Same product: Totolink Ex200
CVE-2024-7336Same product: Totolink Ex200
CVE-2024-31813Same product: Totolink Ex200
CVE-2024-31811Same product: Totolink Ex200
CVE-2024-53333Same product: Totolink Ex200
CVE-2024-31815Same product: Totolink Ex200
CVE-2024-31807Same product: Totolink Ex200
CVE-2024-31812Same product: Totolink Ex200
CVE-2024-31809Same product: Totolink Ex200
CVE-2024-31806Same product: Totolink Ex200

Affected Assets

totolink
ex200 firmware
4.0.3c.7646_b20201211

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

SI-10 requires validity checks on information inputs, directly stopping missing or undefined parameters from being accepted.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and correct parameter handling to avoid this weakness.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing-parameter issues but does not prevent them at design time.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes input validation and parameter handling requirements that reduce improper parameter handling.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for validation of inputs and parameters, mitigating missing or undefined arguments.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly address proper handling of function parameters and input validation.

References