HOMEVULNERABILITIESCVE-2021-30065
HIGH

CVE-2021-30065

NVD-CWE-noinfoPublished: April 3, 2022· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance, crafted ModBus packets can bypass the ModBus enforcer. NOTE: this issue exists because of an incomplete fix of CVE-2017-11401.

NVD Source

Technical Analysis

CVE-2021-30065 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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 full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

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

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-2021-30065
CVSS Score7.5 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected2 vendor(s)
PublishedApr 3, 2022

Related CVEs (NVD-CWE-noinfo)

CVE-2014-1548
10.0
CVE-2014-3525
10.0
CVE-2014-4227
10.0
CVE-2014-1547
10.0
CVE-2014-0609
10.0
CVE-2014-2632
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-30065 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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