VDB-284333 · CVE-2021-27703 · GCVE-0-2021-27703

Sercomm Model Etisalat Model S3 AC2100 Firmware Update Page 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.
4.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Sercomm Model Etisalat Model S3 AC2100. It has been rated as problematic. Impacted is an unknown function of the component Firmware Update Page. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2021-27703. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Sercomm Model Etisalat Model S3 AC2100 (version unknown) and classified as problematic. This issue affects an unknown function of the component Firmware Update Page. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

Sercomm Model Etisalat Model S3- AC2100 is affected by Cross Site Scripting (XSS) via the firmware update page.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2021-27703 since 02/25/2021. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

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

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Productinfo

Vendor

Sercomm

Name

Model Etisalat Model S3 AC2100

CPE 2.3info

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CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (MITRE): 🔍

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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

02/25/2021 🔍
11/13/2024 +1357 days 🔍
11/13/2024 +0 days 🔍
02/27/2025 +106 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2021-27703 (🔍)
GCVE (CVE): GCVE-0-2021-27703
GCVE (VulDB): GCVE-100-284333

Entryinfo

Created: 11/13/2024 09:14
Updated: 02/27/2025 10:40
Changes: 11/13/2024 09:14 (52), 11/16/2024 05:21 (12), 02/27/2025 10:40 (3)
Complete: 🔍
Cache ID: 216::103