CVE-2021-30065
On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21,...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2021-30065- CVSS 3.1
- 7.5 High
CVSS:3.1/AC:L/AV:N/A:N/C:N/I:H/PR:N/S:U/UI:N - Updated
- 2026-11-02
EUVDEUVD-2021-17009
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.
- Record
EUVD-2021-17009- CVSS 3.1
- 7.5 High
CVSS:3.1/AC:L/AV:N/A:N/C:N/I:H/PR:N/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-264c-27mg-g32w
On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21,...
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.
- Record
GHSA-264c-27mg-g32w- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-30065- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Updated
- 2026-11-02
Affected products
- belden eagle 20 tofino 943 987-501-tx\/tx firmware
- belden eagle 20 tofino 943 987-502 -tx\/mm firmware
- belden eagle 20 tofino 943 987-504-mm\/tx firmware
- belden eagle 20 tofino 943 987-505-mm\/mm firmware
- belden tofino argon fa-tsa-100-tx\/tx firmware
- belden tofino argon fa-tsa-220-mm\/mm firmware
- belden tofino argon fa-tsa-220-mm\/tx firmware
- belden tofino argon fa-tsa-220-tx\/mm firmware
- belden tofino argon fa-tsa-220-tx\/tx firmware
- belden tofino xenon security appliance firmware
- schneider-electric tcsefea23f3f20 firmware
- schneider-electric tcsefea23f3f21 firmware
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History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-30065 is a high vulnerability (CVSS 7.5) in Belden Eagle 20 Tofino 943 987-501-tx\/tx Firmware, published April 3, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.88%, the 59th percentile. No source names a fixed version.