CVE-2021-30063

Name: CVE-2021-30063
Creator: NVD / NIST
Published: 2022-04-03T22:15:14.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.96%

Last modified Jun 17, 2026

CVE-2021-30063 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. On Schneider Electric ConneXium Tofino OPCLSM TCSEFM0000 before 03.23 and Belden Tofino Xenon Security Appliance, crafted OPC packets can cause an OPC enforcer denial of service.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

Description

On Schneider Electric ConneXium Tofino OPCLSM TCSEFM0000 before 03.23 and Belden Tofino Xenon Security Appliance, crafted OPC packets can cause an OPC enforcer denial of service.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.96%

57.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Belden	Tofino Xenon Security Appliance Firmware	< 03.2.03
Belden	Tofino Argon Fa-Tsa-220-Tx\/Mm Firmware	All versions
Belden	Tofino Argon Fa-Tsa-220-Tx\/Tx Firmware	All versions
Belden	Tofino Argon Fa-Tsa-220-Mm\/Tx Firmware	All versions
Belden	Tofino Argon Fa-Tsa-220-Mm\/Mm Firmware	All versions
Belden	Tofino Argon Fa-Tsa-100-Tx\/Tx Firmware	All versions
Belden	Eagle 20 Tofino 943 987-505-Mm\/Mm Firmware	All versions
Belden	Eagle 20 Tofino 943 987-504-Mm\/Tx Firmware	All versions
Belden	Eagle 20 Tofino 943 987-502 -Tx\/Mm Firmware	All versions
Belden	Eagle 20 Tofino 943 987-501-Tx\/Tx Firmware	All versions
Schneider-Electric	Tcsefm0000 Firmware	< 03.23

References

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

Timeline

Published: Apr 3, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30063?

On Schneider Electric ConneXium Tofino OPCLSM TCSEFM0000 before 03.23 and Belden Tofino Xenon Security Appliance, crafted OPC packets can cause an OPC enforcer denial of service.

How severe is CVE-2021-30063?

CVE-2021-30063 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30063?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30063?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST