CVE-2020-26556

lowpriority · track · 30EPSS 0.009 · 60 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.91% (60th) EPSS

CVSS 2.9 · low

Is it mine?

17 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedFirmware allversions installed on RSM-EX01B product Familypepperl_fuchs_psirt
The device will play a confirmation sound when a Bluetooth connection is successfully established and a status LED labeled BT indicates that a Bluetooth connection is active. This can be used to detect an unauthenticated connection.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.9–7.5

v2.02.9lowAV:A/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 5.5 · impact 2.9

v3.17.5highCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.6 · impact 5.9

v3.17.5highCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Pepperl+Fuchs PSIRT DE

v3.16.9mediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-307USprimaryCWE-307US

affected products (17)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell NetWorker virtualall versionscert_bundDEcpe:/a:dell:networker:virtual
EMC Avamarall versionscert_bundDEcpe:/a:emc:avamar:-
IBM Business Automation Workflow 24.0.0all versionscert_bundDEcpe:/a:ibm:business_automation_workflow:24.0.0
Lenovo Computerall versionscert_bundDEcpe:/o:lenovo:lenovo_computer:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Specification Bluetoothall versionscert_bundDEcpe:/a:specification:bluetooth:bluetooth
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
n/a n/a≤ n/aenisa_euvdEU
bluetooth bluetooth core specification1.0b → 5.2nvdUScpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:*
bluetooth mesh profile= 1.0.0nvdUScpe:2.3:a:bluetooth:mesh_profile:*:*:*:*:*:*:*:*
bluetooth mesh profile= 1.0.1nvdUScpe:2.3:a:bluetooth:mesh_profile:*:*:*:*:*:*:*:*
Firmware allversions installed on RSM-EX01B product Familyall versionspepperl_fuchs_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

VDE-2022-021Pepperl+Fuchs: RSM-EX devices - Multiple Bluetooth vulnerabilities2022-05-16csaf · pepperl_fuchs_psirtDE
Critical vulnerabilities have been discovered in the utilized Bluetooth component. For more information see: https://kb.cert.org/vuls/id/799380
WID-SEC-W-2022-1813Bluetooth: Mehrere SchwachstellenDeutsch2021-05-24csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Bluetooth Standard ausnutzen, um Dateien zu manipulieren oder Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd pepperl_fuchs_psirt NVD CVE.org MITRE

published 2021-05-24modified 2026-06-17

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references (13)

External citations — patches, advisories, analysis.

scry

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