How severe is CVE-2025-4321?

CVE-2025-4321 has a CVSS 4.0 base score of 7.1, rated high severity.

Is CVE-2025-4321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-4321?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-4321 have an EU (EUVD) identifier?

Yes. CVE-2025-4321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-197801.

When was CVE-2025-4321 published?

CVE-2025-4321 was published on 2025-11-17 and last updated on 2026-06-17.

CVE-2025-4321

CVE-2025-4321 is a high-severity vulnerability with a CVSS 4.0 base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-240.

Key facts

Severity: High (CVSS 4.0 base score 7.1)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-197801
Weakness: CWE-240
Published: 2025-11-17
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-4321?: 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
How severe is CVE-2025-4321?: CVE-2025-4321 has a CVSS 4.0 base score of 7.1, rated high severity.
Is CVE-2025-4321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-4321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-4321 have an EU (EUVD) identifier?: Yes. CVE-2025-4321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-197801.
When was CVE-2025-4321 published?: CVE-2025-4321 was published on 2025-11-17 and last updated on 2026-06-17.

References

https://community.silabs.com/068Vm00000YV9DL

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