Is CVE-2021-3658 in the CISA KEV catalog?

No. CVE-2021-3658 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3658?

CVE-2021-3658 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-3658?

CVE-2021-3658 has an EPSS score of 0.80% (52th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3658?

Upgrade bluez on debian 11 to 5.55-3.1+deb11u2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3658

MEDIUM

6.5

CVSS v3

NVD

Description

bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.

CWE-863Incorrect Authorization

How to fix

Remediation Available

bluezDebian

Fixed in:5.55-3.1+deb11u2CVE-2021-3658

Fixed in:5.61-1CVE-2021-3658

bluezUbuntu

Fixed in:5.48-0ubuntu3.6USN-5155-1

Fixed in:5.53-0ubuntu3.4USN-5155-1

libbluetooth3Ubuntu

Fixed in:5.48-0ubuntu3.6USN-5155-1

Fixed in:5.53-0ubuntu3.4USN-5155-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.80%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Patch4

Third-Party Advisory1

security.netapp.com

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-22518	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-38035	Critical	9.8	100%	KEV + Ransom	-
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2024-38856	Critical	9.8	99%	KEV	Fix
CVE-2020-36289	Medium	5.3	99%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-15.