CVE-2021-30061

Physical code execution via crafted USB file

Published Apr 3, 2022 · Updated Aug 3, 2024

Code execution in Schneider Electric and Belden Tofino firewalls allows physically proximate attackers to run code from a crafted USB file. The vendors have not disclosed the file format, processing component, or unsafe operation that causes the appliance to execute the file. Exploitation requires physical access to insert a prepared USB stick and grants code execution on the firewall appliance, affecting its confidentiality, integrity, and availability.

CVSS severity6.8
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Schneider Electric and Belden Tofino firewalls allows physically proximate attackers to run code from a crafted USB file. The vendors have not disclosed the file format, processing component, or unsafe operation that causes the appliance to execute the file. Exploitation requires physical access to insert a prepared USB stick and grants code execution on the firewall appliance, affecting its confidentiality, integrity, and availability.

The record

CVE
CVE-2021-30061
Published
Apr 3, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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