# Phoenix Contact mGuard Devices versions before 8.8.3: LAN ports get functional after reboot even if they are disabled in the device configuration

CVE record · `CVE-2020-12523`

- **Identifiers:** `CVE-2020-12523`
- **State:** Confirmed
- **Severity:** CVSS 5.4 Medium
- **Critical:** No
- **CNA:** CERTVDE
- **Weakness (CWE):** [CWE-909](https://cwe.mitre.org/data/definitions/909.html)
- **Tags:** [CWE-909](https://agentprime.io/advisories/tag/cwe-909.md)
- **Technologies:** [Phoenix Contact TC MGUARD RS4000 4G VZW VPN (1010461)](https://agentprime.io/advisories/technology/phoenix-contact-tc-mguard-rs4000-4g-vzw-vpn-1010461.md) · [Phoenix Contact TC MGUARD RS4000 4G ATT VPN (1010463)](https://agentprime.io/advisories/technology/phoenix-contact-tc-mguard-rs4000-4g-att-vpn-1010463.md) · [Phoenix Contact FL MGUARD RS4004 TX/DTX (2701876)](https://agentprime.io/advisories/technology/phoenix-contact-fl-mguard-rs4004-tx-dtx-2701876.md) · [Phoenix Contact FL MGUARD RS4004 TX/DTX VPN (2701877)](https://agentprime.io/advisories/technology/phoenix-contact-fl-mguard-rs4004-tx-dtx-vpn-2701877.md) · [Phoenix Contact TC MGUARD RS4000 3G VPN (2903440)](https://agentprime.io/advisories/technology/phoenix-contact-tc-mguard-rs4000-3g-vpn-2903440.md) · [Phoenix Contact TC MGUARD RS4000 4G VPN (2903586)](https://agentprime.io/advisories/technology/phoenix-contact-tc-mguard-rs4000-4g-vpn-2903586.md) · [Innominate mGuard rs4000 4TX/TX](https://agentprime.io/advisories/technology/innominate-mguard-rs4000-4tx-tx.md) · [Innominate mGuard rs4000 4TX/TX VPN](https://agentprime.io/advisories/technology/innominate-mguard-rs4000-4tx-tx-vpn.md) · [Innominate mGuard rs4000 4TX/3G/TX VPN](https://agentprime.io/advisories/technology/innominate-mguard-rs4000-4tx-3g-tx-vpn.md)
- **Published:** 17 Dec 2020
- **Updated:** 16 Sept 2024
- **Reviewed by a person:** No

Published by the CVE Program (CNA: CERTVDE) at 17 Dec 2020, 22:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Phoenix Contact. Product: TC MGUARD RS4000 4G VZW VPN (1010461).
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Phoenix Contact. Product: TC MGUARD RS4000 4G ATT VPN (1010463).
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Phoenix Contact. Product: FL MGUARD RS4004 TX/DTX (2701876).
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Phoenix Contact. Product: FL MGUARD RS4004 TX/DTX VPN (2701877).
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Phoenix Contact. Product: TC MGUARD RS4000 3G VPN (2903440).
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Phoenix Contact. Product: TC MGUARD RS4000 4G VPN (2903586).
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Innominate. Product: Innominate mGuard rs4000 4TX/TX.
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Innominate. Product: Innominate mGuard rs4000 4TX/TX VPN.
  - affected: `unspecified to before 8.8.3` (custom)
- Vendor: Innominate. Product: Innominate mGuard rs4000 4TX/3G/TX VPN.
  - affected: `unspecified to before 8.8.3` (custom)

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 5.4 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L`, from CNA (CERTVDE)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0090, the 59th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Dec 2020. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2020-12523](https://www.cve.org/CVERecord?id=CVE-2020-12523)
- [NVD: CVE-2020-12523](https://nvd.nist.gov/vuln/detail/CVE-2020-12523)

### References from the CNA

- <https://cert.vde.com/en-us/advisories/vde-2020-046> (confirm)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2020-12523>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2020-12523/>. Everything for agents: <https://agentprime.io/llms.txt>.