Is CVE-2020-26558 in the CISA KEV catalog?

No. CVE-2020-26558 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-26558?

CVE-2020-26558 has a CVSS v3 base score of 4.2 (MEDIUM).

What is the EPSS score for CVE-2020-26558?

CVE-2020-26558 has an EPSS score of 0.87% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-26558?

Upgrade bluez on debian 11 to 5.55-3.1 or later. Fixes are available for 115 affected products.

CVE & CISA-KEV Catalog

CVE-2020-26558

MEDIUM

4.2

CVSS v3

NVD

Description

Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time.

CWE-287Improper Authentication

How to fix

Remediation Available

bluezDebian

Fixed in:5.55-3.1CVE-2020-26558

bluezUbuntu

Fixed in:5.37-0ubuntu5.3+esm1USN-4989-2

Fixed in:5.48-0ubuntu3.5USN-4989-1

Fixed in:5.53-0ubuntu3.2USN-4989-1

libbluetooth3Ubuntu

Fixed in:5.37-0ubuntu5.3+esm1USN-4989-2

Fixed in:5.48-0ubuntu3.5USN-4989-1

Fixed in:5.53-0ubuntu3.2USN-4989-1

linuxUbuntu

Fixed in:4.4.0-219.252USN-5299-1

Fixed in:4.4.0-222.255USN-5343-1

Fixed in:4.15.0-151.157USN-5018-1

Fixed in:5.4.0-80.90USN-5017-1

linux-awsUbuntu

Fixed in:4.4.0-1099.104USN-5299-1

Fixed in:4.4.0-1102.107USN-5343-1

Fixed in:4.4.0-1135.149USN-5299-1

Fixed in:4.4.0-1138.152USN-5343-1

Fixed in:4.15.0-1109.116USN-5018-1

Fixed in:5.4.0-1054.57USN-5017-1

linux-aws-5.4Ubuntu

Fixed in:5.4.0-1054.57~18.04.1USN-5017-1

linux-aws-5.8Ubuntu

Fixed in:5.8.0-1042.44~20.04.1USN-5050-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1109.116~16.04.1USN-5018-1

linux-azureUbuntu

Fixed in:4.15.0-1121.134~14.04.1USN-5018-1

Fixed in:4.15.0-1121.134~16.04.1USN-5018-1

Fixed in:5.4.0-1055.57USN-5017-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1121.134USN-5018-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1055.57~18.04.1USN-5017-1

linux-azure-5.8Ubuntu

Fixed in:5.8.0-1040.43~20.04.1USN-5050-1

linux-gcpUbuntu

Fixed in:4.15.0-1106.120~16.04.1USN-5018-1

Fixed in:5.4.0-1049.53USN-5017-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1106.120USN-5018-1

linux-gcp-5.4Ubuntu

Fixed in:5.4.0-1049.53~18.04.1USN-5017-1

linux-gcp-5.8Ubuntu

Fixed in:5.8.0-1039.41USN-5050-1

linux-gkeUbuntu

Fixed in:5.4.0-1049.52USN-5017-1

linux-gke-5.4Ubuntu

Fixed in:5.4.0-1049.52~18.04.1USN-5017-1

linux-gkeopUbuntu

Fixed in:5.4.0-1021.22USN-5017-1

linux-gkeop-5.4Ubuntu

Fixed in:5.4.0-1021.22~18.04.1USN-5017-1

linux-hweUbuntu

Fixed in:4.15.0-151.157~16.04.1USN-5018-1

linux-hwe-5.11Ubuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-hwe-5.4Ubuntu

Fixed in:5.4.0-80.90~18.04.1USN-5017-1

linux-image-4.15.0-1078-oracleUbuntu

Fixed in:4.15.0-1078.86~16.04.1USN-5018-1

Fixed in:4.15.0-1078.86USN-5018-1

linux-image-4.15.0-1092-raspi2Ubuntu

Fixed in:4.15.0-1092.98USN-5018-1

linux-image-4.15.0-1097-kvmUbuntu

Fixed in:4.15.0-1097.99USN-5018-1

linux-image-4.15.0-1106-gcpUbuntu

Fixed in:4.15.0-1106.120~16.04.1USN-5018-1

Fixed in:4.15.0-1106.120USN-5018-1

linux-image-4.15.0-1109-awsUbuntu

Fixed in:4.15.0-1109.116~16.04.1USN-5018-1

Fixed in:4.15.0-1109.116USN-5018-1

linux-image-4.15.0-1109-snapdragonUbuntu

Fixed in:4.15.0-1109.118USN-5018-1

linux-image-4.15.0-1121-azureUbuntu

Fixed in:4.15.0-1121.134~14.04.1USN-5018-1

Fixed in:4.15.0-1121.134~16.04.1USN-5018-1

Fixed in:4.15.0-1121.134USN-5018-1

linux-image-4.15.0-151-genericUbuntu

Fixed in:4.15.0-151.157~16.04.1USN-5018-1

Fixed in:4.15.0-151.157USN-5018-1

linux-image-4.15.0-151-generic-lpaeUbuntu

Fixed in:4.15.0-151.157USN-5018-1

linux-image-4.15.0-151-lowlatencyUbuntu

Fixed in:4.15.0-151.157~16.04.1USN-5018-1

Fixed in:4.15.0-151.157USN-5018-1

linux-image-4.4.0-1099-awsUbuntu

Fixed in:4.4.0-1099.104USN-5299-1

linux-image-4.4.0-1100-kvmUbuntu

Fixed in:4.4.0-1100.109USN-5299-1

linux-image-4.4.0-1102-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

linux-image-4.4.0-1103-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

linux-image-4.4.0-1135-awsUbuntu

Fixed in:4.4.0-1135.149USN-5299-1

linux-image-4.4.0-1138-awsUbuntu

Fixed in:4.4.0-1138.152USN-5343-1

linux-image-4.4.0-219-genericUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-219-lowlatencyUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-222-genericUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-4.4.0-222-lowlatencyUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-5.11.0-27-genericUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.11.0-27-generic-64kUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.11.0-27-generic-lpaeUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.11.0-27-lowlatencyUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.4.0-1021-gkeopUbuntu

Fixed in:5.4.0-1021.22~18.04.1USN-5017-1

Fixed in:5.4.0-1021.22USN-5017-1

linux-image-5.4.0-1041-raspiUbuntu

Fixed in:5.4.0-1041.45~18.04.1USN-5017-1

Fixed in:5.4.0-1041.45USN-5017-1

linux-image-5.4.0-1044-kvmUbuntu

Fixed in:5.4.0-1044.46USN-5017-1

linux-image-5.4.0-1049-gcpUbuntu

Fixed in:5.4.0-1049.53~18.04.1USN-5017-1

Fixed in:5.4.0-1049.53USN-5017-1

linux-image-5.4.0-1049-gkeUbuntu

Fixed in:5.4.0-1049.52~18.04.1USN-5017-1

Fixed in:5.4.0-1049.52USN-5017-1

linux-image-5.4.0-1052-oracleUbuntu

Fixed in:5.4.0-1052.56~18.04.1USN-5017-1

Fixed in:5.4.0-1052.56USN-5017-1

linux-image-5.4.0-1054-awsUbuntu

Fixed in:5.4.0-1054.57~18.04.1USN-5017-1

Fixed in:5.4.0-1054.57USN-5017-1

linux-image-5.4.0-1055-azureUbuntu

Fixed in:5.4.0-1055.57~18.04.1USN-5017-1

Fixed in:5.4.0-1055.57USN-5017-1

linux-image-5.4.0-80-genericUbuntu

Fixed in:5.4.0-80.90~18.04.1USN-5017-1

Fixed in:5.4.0-80.90USN-5017-1

linux-image-5.4.0-80-generic-lpaeUbuntu

Fixed in:5.4.0-80.90~18.04.1USN-5017-1

Fixed in:5.4.0-80.90USN-5017-1

linux-image-5.4.0-80-lowlatencyUbuntu

Fixed in:5.4.0-80.90~18.04.1USN-5017-1

Fixed in:5.4.0-80.90USN-5017-1

linux-image-5.8.0-1038-oracleUbuntu

Fixed in:5.8.0-1038.39~20.04.1USN-5050-1

linux-image-5.8.0-1039-gcpUbuntu

Fixed in:5.8.0-1039.41USN-5050-1

linux-image-5.8.0-1040-azureUbuntu

Fixed in:5.8.0-1040.43~20.04.1USN-5050-1

linux-image-5.8.0-1042-awsUbuntu

Fixed in:5.8.0-1042.44~20.04.1USN-5050-1

linux-image-awsUbuntu

Fixed in:4.4.0.1102.100USN-5343-1

Fixed in:4.4.0.1099.97USN-5299-1

Fixed in:4.4.0.1135.140USN-5299-1

Fixed in:4.4.0.1138.143USN-5343-1

Fixed in:5.4.0.1054.37USN-5017-1

Fixed in:5.8.0.1042.44~20.04.14USN-5050-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1109.100USN-5018-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1109.112USN-5018-1

linux-image-aws-lts-20.04Ubuntu

Fixed in:5.4.0.1054.57USN-5017-1

linux-image-azureUbuntu

Fixed in:4.15.0.1121.94USN-5018-1

Fixed in:4.15.0.1121.112USN-5018-1

Fixed in:5.4.0.1055.35USN-5017-1

Fixed in:5.8.0.1040.43~20.04.12USN-5050-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1121.94USN-5018-1

linux-image-azure-lts-20.04Ubuntu

Fixed in:5.4.0.1055.53USN-5017-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1106.107USN-5018-1

Fixed in:5.4.0.1049.36USN-5017-1

Fixed in:5.8.0.1039.14USN-5050-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1106.125USN-5018-1

linux-image-gcp-lts-20.04Ubuntu

Fixed in:5.4.0.1049.59USN-5017-1

linux-image-genericUbuntu

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.80.84USN-5017-1

linux-image-generic-64k-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.151.146USN-5018-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

linux-image-generic-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-generic-lpaeUbuntu

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.80.84USN-5017-1

linux-image-generic-lpae-hwe-18.04Ubuntu

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

linux-image-generic-lpae-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1106.107USN-5018-1

Fixed in:5.4.0.1049.59USN-5017-1

linux-image-gke-5.4Ubuntu

Fixed in:5.4.0.1049.52~18.04.15USN-5017-1

Fixed in:5.4.0.1049.59USN-5017-1

linux-image-gkeopUbuntu

Fixed in:5.4.0.1021.24USN-5017-1

linux-image-gkeop-5.4Ubuntu

Fixed in:5.4.0.1021.22~18.04.22USN-5017-1

Fixed in:5.4.0.1021.24USN-5017-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1100.98USN-5299-1

Fixed in:4.4.0.1103.101USN-5343-1

Fixed in:4.15.0.1097.93USN-5018-1

Fixed in:5.4.0.1044.43USN-5017-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.80.84USN-5017-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.151.146USN-5018-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

linux-image-lowlatency-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.219.190USN-5299-1

Fixed in:4.4.0.222.193USN-5343-1

linux-image-oemUbuntu

Fixed in:4.15.0.151.146USN-5018-1

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

Fixed in:5.4.0.80.84USN-5017-1

linux-image-oem-osp1Ubuntu

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

Fixed in:5.4.0.80.84USN-5017-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1078.66USN-5018-1

Fixed in:5.4.0.1052.56~18.04.32USN-5017-1

Fixed in:5.8.0.1038.39~20.04.14USN-5050-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1078.88USN-5018-1

linux-image-oracle-lts-20.04Ubuntu

Fixed in:5.4.0.1052.52USN-5017-1

linux-image-raspiUbuntu

Fixed in:5.4.0.1041.76USN-5017-1

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1041.44USN-5017-1

linux-image-raspi2Ubuntu

Fixed in:4.15.0.1092.90USN-5018-1

Fixed in:5.4.0.1041.76USN-5017-1

linux-image-snapdragonUbuntu

Fixed in:4.15.0.1109.112USN-5018-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

linux-image-virtualUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.80.84USN-5017-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.151.146USN-5018-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.4.0.80.90~18.04.72USN-5017-1

linux-image-virtual-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

Fixed in:4.4.0-1100.109USN-5299-1

Fixed in:4.15.0-1097.99USN-5018-1

Fixed in:5.4.0-1044.46USN-5017-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

linux-oracleUbuntu

Fixed in:4.15.0-1078.86~16.04.1USN-5018-1

Fixed in:4.15.0-1078.86USN-5018-1

Fixed in:5.4.0-1052.56USN-5017-1

linux-oracle-5.4Ubuntu

Fixed in:5.4.0-1052.56~18.04.1USN-5017-1

linux-oracle-5.8Ubuntu

Fixed in:5.8.0-1038.39~20.04.1USN-5050-1

linux-raspiUbuntu

Fixed in:5.4.0-1041.45USN-5017-1

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1041.45~18.04.1USN-5017-1

linux-raspi2Ubuntu

Fixed in:4.15.0-1092.98USN-5018-1

linux-snapdragonUbuntu

Fixed in:4.15.0-1109.118USN-5018-1

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.87%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Vendor Advisory1

bluetooth.com

Third-Party Advisory8

Other references2

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	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 2025-11-04.