VDB-171840 · CVE-2021-3275 · GCVE-0-2021-3275

TP-LINK Archer C3150v2 dhcp.htm setDefaultHostname cross site scripting

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.
5.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in TP-LINK TD-W9977v1, TL-WA801NDv5, TL-WA801Nv6, TL-WA802Nv5 and Archer C3150v2 and classified as problematic. This impacts the function setDefaultHostname of the file dhcp.htm. The manipulation results in cross site scripting. This vulnerability is known as CVE-2021-3275. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in TP-LINK TD-W9977v1, TL-WA801NDv5, TL-WA801Nv6, TL-WA802Nv5 and Archer C3150v2 (Router Operating System). Affected is the function setDefaultHostname of the file dhcp.htm. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity.

The weakness was published 03/27/2021. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2021-3275. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

The exploit is shared for download at packetstormsecurity.com. It is declared as proof-of-concept. By approaching the search of inurl:dhcp.htm it is possible to find vulnerable targets with Google Hacking.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Router Operating System

Vendor

TP-LINK

Name

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: 5.2
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

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

01/22/2021 🔍
03/27/2021 +64 days 🔍
03/27/2021 +0 days 🔍
05/04/2025 +1499 days 🔍

Sourcesinfo

Vendor: tp-link.com

Advisory: github.com
Status: Not defined

CVE: CVE-2021-3275 (🔍)
GCVE (CVE): GCVE-0-2021-3275
GCVE (VulDB): GCVE-100-171840
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/27/2021 08:55
Updated: 05/04/2025 03:50
Changes: 03/27/2021 08:55 (37), 04/05/2021 19:07 (2), 04/05/2021 19:14 (18), 06/16/2024 04:06 (23), 05/04/2025 03:50 (7)
Complete: 🔍
Cache ID: 216::103