VDB-240103 · CVE-2023-43137 · EUVD-2023-47556

TP-Link TL-ER5120G 2.0.0 Build 210817 Rel.80868n ACL Rule Name command injection

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.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in TP-Link TL-ER5120G 2.0.0 Build 210817 Rel.80868n and classified as critical. The affected element is an unknown function of the component ACL Rule Handler. This manipulation of the argument Name causes command injection. This vulnerability appears as CVE-2023-43137. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in TP-Link TL-ER5120G 2.0.0 Build 210817 Rel.80868n (Router Operating System). Affected by this vulnerability is an unknown part of the component ACL Rule Handler. The manipulation of the argument name with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

TPLINK TL-ER5120G 4.0 2.0.0 Build 210817 Rel.80868n has a command injection vulnerability, when an attacker adds ACL rules after authentication, and the rule name parameter has injection points.

The weakness was presented 09/21/2023. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-43137 since 09/18/2023. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

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-2023-47556). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Router Operating System

Vendor

TP-Link

Name

TL-ER5120G

Version

2.0.0 Build 210817 Rel.80868n

License

commercial

Website

Vendor: https://www.tp-link.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

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: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

09/18/2023 🔍
09/21/2023 +3 days 🔍
09/21/2023 +0 days 🔍
02/03/2026 +866 days 🔍

Sourcesinfo

Vendor: tp-link.com

Advisory: github.com
Status: Not defined

CVE: CVE-2023-43137 (🔍)
GCVE (CVE): GCVE-0-2023-43137
GCVE (VulDB): GCVE-100-240103
EUVD: 🔍

Entryinfo

Created: 09/21/2023 07:14
Updated: 02/03/2026 06:21
Changes: 09/21/2023 07:14 (40), 10/14/2023 07:55 (11), 02/03/2026 06:21 (16)
Complete: 🔍
Cache ID: 216::103