What is the CVSS score of CVE-2024-31815?

CVE-2024-31815 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.6%.

Is there a public PoC exploit available for CVE-2024-31815?

Yes, a public proof-of-concept exploit is available for CVE-2024-31815. Prioritise patching immediately. EPSS: 0.6%.

Ex200 Firmware CVE-2024-31815

CRITICAL

Authorization Bypass Through User-Controlled Key (CWE-639)

2024-04-08 cve@mitre.org

Authentication Bypass TOTOLINK Ex200 Firmware

9.1

CVSS 3.1 · Vendor: mitre

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Vulnerability Assessment

Weakness	CWE CWE-639 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Object-level authorization, IDOR prevention
Impact	CVSS score of 9.1 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.6% exploitation probability (EPSS)

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AnalysisAI

In TOTOLINK EX200 V4.0.3c.7314_B20191204, an attacker can obtain the configuration file without authorization through /cgi-bin/ExportSettings.sh. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-639. In TOTOLINK EX200 V4.0.3c.7314_B20191204, an attacker can obtain the configuration file without authorization through /cgi-bin/ExportSettings.sh 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 9.1 CRITICAL

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

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

CVSS VectorVendor: mitre

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

DescriptionCVE.org

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

Threat Intelligence Overview

EPSS Score

0.6%

Top 56% exploitable

Exploit

POC

Public exploit code exists

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 CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.6%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

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

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +46

PoC: +20

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:*:*:*:*:*:*:*

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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-2024-31814 HIGH This Week POC

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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_

CVE-2024-53333 MEDIUM This Month POC

6.3 Nov 21

TOTOLINK EX200 v4.0.3c.7646_B20201211 was found to contain a command insertion vulnerability in the setUssd function. Ra

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