VDB-236601 · CVE-2023-40042 · EUVD-2023-44649

TOTOLINK T10_v2 5.9c.5061_B20200511 /lib/cste_modules/lan.so setStaticDhcpConfig Comment stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in TOTOLINK T10_v2 5.9c.5061_B20200511. This affects the function setStaticDhcpConfig in the library /lib/cste_modules/lan.so. Performing a manipulation of the argument Comment results in stack-based overflow. This vulnerability is identified as CVE-2023-40042. The attack may be carried out on the physical device. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in TOTOLINK T10_v2 5.9c.5061_B20200511. This affects the function setStaticDhcpConfig in the library /lib/cste_modules/lan.so. The manipulation of the argument comment with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

TOTOLINK T10_v2 5.9c.5061_B20200511 has a stack-based buffer overflow in setStaticDhcpConfig in /lib/cste_modules/lan.so. Attackers can send crafted data in an MQTT packet, via the comment parameter, to control the return address and execute code.

The weakness was released 08/08/2023. This vulnerability is uniquely identified as CVE-2023-40042. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-44649). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

TOTOLINK

Name

T10_v2

Version

5.9c.5061_B20200511

License

commercial

Website

Vendor: https://www.totolink.net/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.1
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/08/2023 🔍
08/08/2023 +0 days 🔍
08/08/2023 +0 days 🔍
01/27/2026 +903 days 🔍

Sourcesinfo

Vendor: totolink.net

Status: Not defined

CVE: CVE-2023-40042 (🔍)
GCVE (CVE): GCVE-0-2023-40042
GCVE (VulDB): GCVE-100-236601
EUVD: 🔍

Entryinfo

Created: 08/08/2023 21:33
Updated: 01/27/2026 16:56
Changes: 08/08/2023 21:33 (38), 09/02/2023 11:43 (1), 01/27/2026 16:56 (15)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.