What is the CVSS score of CVE-2024-31813?

CVE-2024-31813 has a CVSS 3.1 base score of 8.4 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Ex200 Firmware CVE-2024-31813

HIGH

Missing Authorization (CWE-862)

2024-04-08 cve@mitre.org

Authentication Bypass TOTOLINK Ex200 Firmware

8.4

CVSS 3.1 · Vendor: mitre

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Vulnerability Assessment

Weakness	CWE CWE-862 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization checks on every request MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 8.4 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	A local attacker with access to the system could access resources or perform actions without proper authorization checks. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAI

TOTOLINK EX200 V4.0.3c.7646_B20201211 does not contain an authentication mechanism by default. Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.

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

This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. TOTOLINK EX200 V4.0.3c.7646_B20201211 does not contain an authentication mechanism by default. Affected products include: Totolink Ex200 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (mitre) PRIMARY 8.4 HIGH

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

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

TOTOLINK EX200 V4.0.3c.7646_B20201211 does not contain an authentication mechanism by default.

Threat Intelligence Overview

EPSS Score

0.2%

Top 90% exploitable

Data Quality

3 sources

Confidence: Low

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 0.2%

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

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +42

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.

Affected Products (CPE)CVE.org

cpe:2.3:o:totolink:ex200_firmware:4.0.3c.7646_b20201211:*:*:*:*:*:*:*

More in Ex200 Firmware

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CVE-2024-31810 CRITICAL Act Now POC

9.8 May 14

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a hardcoded password for root at /etc/shadow.sample. Rat

CVE-2024-31807 CRITICAL Act Now POC

9.8 Apr 08

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the host

CVE-2024-31815 CRITICAL Act Now POC

9.1 Apr 08

In TOTOLINK EX200 V4.0.3c.7314_B20191204, an attacker can obtain the configuration file without authorization through /c

CVE-2024-31814 HIGH This Week POC

8.8 Apr 08

TOTOLINK EX200 V4.0.3c.7646_B20201211 allows attackers to bypass login through the Form_Login function. Rated high sever

CVE-2024-31809 HIGH This Week POC

8.8 Apr 08

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the File

CVE-2024-31808 HIGH This Week POC

8.8 Apr 08

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the webW

CVE-2024-7336 HIGH This Week POC

8.7 Aug 01

A vulnerability classified as critical was found in TOTOLINK EX200 4.0.3c.7646_B20201211. Rated high severity (CVSS 8.7)

CVE-2024-7335 HIGH This Week POC

8.7 Aug 01

A vulnerability classified as critical has been found in TOTOLINK EX200 4.0.3c.7646_B20201211. Rated high severity (CVSS

CVE-2024-31811 HIGH This Week POC

8.0 Apr 08

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the lang

CVE-2024-31817 HIGH This Week POC

7.5 Apr 08

In TOTOLINK EX200 V4.0.3c.7646_B20201211, an attacker can obtain sensitive information without authorization through the

CVE-2024-32326 MEDIUM This Month POC

6.8 Apr 18

TOTOLINK EX200 V4.0.3c.7646_B20201211 contains a Cross-site scripting (XSS) vulnerability through the key parameter in t

CVE-2024-31805 MEDIUM This Month POC

6.5 Apr 08

TOTOLINK EX200 V4.0.3c.7646_B20201211 allows attackers to start the Telnet service without authorization via the telnet_

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CVE-2024-0012 CRITICAL POC

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References

Advisories & patches

REF https://github.com/4hsien/CVE-vulns/blob/main/TOTOLINK/EX200/Missing_Authentication/missauth.md

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