Missing initialization of resource in Phoenix Contact TC MGUARD RS4000 4G VZW VPN
Priority MEDIUM 41CWE-909Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
On Phoenix Contact mGuard Devices versions before 8.8.3 LAN ports get functional after reboot even if they are disabled in the device configuration. For mGuard devices with integrated switch on the LAN side, single switch ports can be disabled by device configuration. After a reboot these ports get functional independent from their configuration setting: Missing Initialization of Resource
Why it matters now
EPSS 0.00899 59th percentileScored 2026-11-07
Fix Fixed TC MGUARD RS4000 4G VZW VPN (1010461) (Phoenix Contact): 8.8.3TC MGUARD RS4000 4G ATT VPN (1010463) (Phoenix Contact): 8.8.3+7 more products
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Phoenix Contact | TC MGUARD RS4000 4G VZW VPN (1010461) | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Phoenix Contact | TC MGUARD RS4000 4G ATT VPN (1010463) | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Phoenix Contact | FL MGUARD RS4004 TX/DTX (2701876) | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Phoenix Contact | FL MGUARD RS4004 TX/DTX VPN (2701877) | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Phoenix Contact | TC MGUARD RS4000 3G VPN (2903440) | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Phoenix Contact | TC MGUARD RS4000 4G VPN (2903586) | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Innominate | Innominate mGuard rs4000 4TX/TX | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Innominate | Innominate mGuard rs4000 4TX/TX VPN | before 8.8.3 | 8.8.3 | Patch available | CNA |
| Innominate | Innominate mGuard rs4000 4TX/3G/TX VPN | before 8.8.3 | 8.8.3 | Patch available | CNA |
- TC MGUARD RS4000 4G VZW VPN (1010461) VendorPhoenix Contact Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- TC MGUARD RS4000 4G ATT VPN (1010463) VendorPhoenix Contact Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- FL MGUARD RS4004 TX/DTX (2701876) VendorPhoenix Contact Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- FL MGUARD RS4004 TX/DTX VPN (2701877) VendorPhoenix Contact Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- TC MGUARD RS4000 3G VPN (2903440) VendorPhoenix Contact Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- TC MGUARD RS4000 4G VPN (2903586) VendorPhoenix Contact Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- Innominate mGuard rs4000 4TX/TX VendorInnominate Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- Innominate mGuard rs4000 4TX/TX VPN VendorInnominate Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
- Innominate mGuard rs4000 4TX/3G/TX VPN VendorInnominate Affected before 8.8.3 Fixed in 8.8.3 Patch available CNA
CPE configurations NVD · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_4g_vzw_vpn_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_4g_vzw_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_4g_att_vpn_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_4g_att_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_rs4004_tx\/dtx_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:fl_mguard_rs4004_tx\/dtx:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_rs4004_tx\/dtx_vpn_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:fl_mguard_rs4004_tx\/dtx_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_3g_vpn_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_3g_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
- cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_4g_vzw_vpn_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_4g_vzw_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_4g_att_vpn_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_4g_att_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_rs4004_tx\/dtx_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:fl_mguard_rs4004_tx\/dtx:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_rs4004_tx\/dtx_vpn_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:fl_mguard_rs4004_tx\/dtx_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_3g_vpn_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_3g_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
Show 8 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_4g_vpn_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_4g_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:innominate_mguard_rs4000_4tx\/tx_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:innominate_mguard_rs4000_4tx\/tx:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:innominate_mguard_rs4000_4tx\/tx_vpn_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:innominate_mguard_rs4000_4tx\/tx_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:innominate_mguard_rs4000_4tx\/3g\/tx_vpn_firmware:*:*:*:*:*:*:*:* | before 8.8.3 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:innominate_mguard_rs4000_4tx\/3g\/tx_vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
- cpe:2.3:o:phoenixcontact:tc_mguard_rs4000_4g_vpn_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:tc_mguard_rs4000_4g_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:innominate_mguard_rs4000_4tx\/tx_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:innominate_mguard_rs4000_4tx\/tx:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:innominate_mguard_rs4000_4tx\/tx_vpn_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:innominate_mguard_rs4000_4tx\/tx_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:innominate_mguard_rs4000_4tx\/3g\/tx_vpn_firmware:*:*:*:*:*:*:*:* Versions before 8.8.3 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:innominate_mguard_rs4000_4tx\/3g\/tx_vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
Remediation
- Fix · CNA TC MGUARD RS4000 4G VZW VPN (1010461) (Phoenix Contact) Fixed in 8.8.3
- Fix · CNA TC MGUARD RS4000 4G ATT VPN (1010463) (Phoenix Contact) Fixed in 8.8.3
- Fix · CNA FL MGUARD RS4004 TX/DTX (2701876) (Phoenix Contact) Fixed in 8.8.3
- Fix · CNA FL MGUARD RS4004 TX/DTX VPN (2701877) (Phoenix Contact) Fixed in 8.8.3
- Fix · CNA TC MGUARD RS4000 3G VPN (2903440) (Phoenix Contact) Fixed in 8.8.3
- Fix · CNA TC MGUARD RS4000 4G VPN (2903586) (Phoenix Contact) Fixed in 8.8.3
- Fix · CNA Innominate mGuard rs4000 4TX/TX (Innominate) Fixed in 8.8.3
- Fix · CNA Innominate mGuard rs4000 4TX/TX VPN (Innominate) Fixed in 8.8.3
- Fix · CNA Innominate mGuard rs4000 4TX/3G/TX VPN (Innominate) Fixed in 8.8.3
Timeline
- 2026-10-02 Threatist record created from CVE-2020-12523
- 2026-10-03 Alias added: GHSA-fwfg-74jc-wgx8
References
More Phoenix Contact vulnerabilities
- TI-2014-07463 Phoenix Contact Software ProConOs and MultiProg Missing Authentication for Critical Function CVSS 2.0CRITICAL 10.0
- TI-2024-17093 PHOENIX CONTACT: Remote code execution in CHARX Series CVSS 3.1CRITICAL 9.8
- TI-2022-13692 Insufficient Verification of Data Vulnerability in PHOENIX CONTACT classic line industrial controllers CVSS 3.1CRITICAL 9.8
- TI-2026-21959 Remote code execution via uploading a malicious IODD file CVSS 3.1CRITICAL 9.8
- TI-2026-21940 Authentication Bypass in _account_log CVSS 3.1CRITICAL 9.8
- TI-2023-03334 PHOENIX CONTACT: OS Command Injection in WP 6xxx Web panels CVSS 3.1CRITICAL 10.0
Sources
- CVE-2020-12523 · CVE Program
- CVE-2020-12523 · NVD
- FIRST EPSS
- GHSA-fwfg-74jc-wgx8 · GitHub Advisory Database · CC BY 4.0
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