HOMEVULNERABILITIESCVE-2021-30066
MEDIUM

CVE-2021-30066

CWE-347Published: April 3, 2022· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official Description

On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance, an arbitrary firmware image can be loaded because firmware signature verification (for a USB stick) can be bypassed. NOTE: this issue exists because of an incomplete fix of CVE-2017-11400.

NVD Source

Technical Analysis

CVE-2021-30066 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

belden20 product(s)
tofino xenon security appliance firmwaretofino xenon security appliancetofino argon fa-tsa-220-tx\/mm firmwaretofino argon fa-tsa-220-tx\/mmtofino argon fa-tsa-220-tx\/tx firmwaretofino argon fa-tsa-220-tx\/txtofino argon fa-tsa-220-mm\/tx firmwaretofino argon fa-tsa-220-mm\/txtofino argon fa-tsa-220-mm\/mm firmwaretofino argon fa-tsa-220-mm\/mmtofino argon fa-tsa-100-tx\/tx firmwaretofino argon fa-tsa-100-tx\/tx+8
schneider-electric6 product(s)
tcsefea23f3f20 firmwaretcsefea23f3f20tcsefea23f3f21 firmwaretcsefea23f3f21tcsefea23f3f22 firmwaretcsefea23f3f22
Source: NVD CPE · 26 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-05
ADVISORYhttps://www.belden.com/support/security-assurance
ADVISORYhttps://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-05
ADVISORYhttps://www.belden.com/support/security-assurance

All References (4)

→
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-05Vendor Advisory
→
https://www.belden.com/support/security-assuranceVendor Advisory
→
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-05Vendor Advisory
→
https://www.belden.com/support/security-assuranceVendor Advisory

Quick Facts

CVE IDCVE-2021-30066
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-347
CISA KEVNo
Affected2 vendor(s)
PublishedApr 3, 2022

Related CVEs (CWE-347)

CVE-2026-48558
KEV10.0
CVE-2024-32962
10.0
CVE-2026-56451
10.0
CVE-2026-44748
9.9
CVE-2019-6318
9.8
CVE-2017-18146
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-30066 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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