VDB-332652 · CVE-2025-4321 · EUVD-2025-197801

Silabs RS9116W up to 2.12.1 Bluetooth Device inconsistent structural elements

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.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Silabs RS9116W up to 2.12.1. Affected by this issue is some unknown functionality of the component Bluetooth Device Handler. The manipulation results in improper handling of inconsistent structural elements. This vulnerability is reported as CVE-2025-4321. The attacker must have access to the local network to execute the attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Silabs RS9116W up to 2.12.1. Affected is an unknown code block of the component Bluetooth Device Handler. The manipulation with an unknown input leads to a improper handling of inconsistent structural elements vulnerability. CWE is classifying the issue as CWE-240. The product does not handle or incorrectly handles when two or more structural elements should be consistent, but are not. This is going to have an impact on availability. CVE summarizes:

In a Bluetooth device, using RS9116-WiseConnect SDK experiences a Denial of Service, if it receives malformed L2CAP packets, only hard reset will bring the device to normal operation

The advisory is shared for download at community.silabs.com. This vulnerability is traded as CVE-2025-4321 since 05/05/2025. The exploitability is told to be easy. Access to the local network is required for this attack. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly 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-2025-197801). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Silabs

Name

RS9116W

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

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: 🔍

Exploitinginfo

Class: Improper handling of inconsistent structural elements
CWE: CWE-240 / CWE-229 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

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

05/05/2025 CVE reserved
11/17/2025 +196 days Advisory disclosed
11/17/2025 +0 days VulDB entry created
11/17/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: community.silabs.com
Status: Confirmed

CVE: CVE-2025-4321 (🔒)
GCVE (CVE): GCVE-0-2025-4321
GCVE (VulDB): GCVE-100-332652
EUVD: 🔒

Entryinfo

Created: 11/17/2025 17:36
Updated: 11/17/2025 18:14
Changes: 11/17/2025 17:36 (64), 11/17/2025 18:14 (1)
Complete: 🔍
Cache ID: 216::103