CVE-2020-12523 json
Phoenix Contact mGuard Devices versions before 8.8.3: LAN ports get functional after reboot even if they are disabled in the device configuration
published 2020-12-17 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4825
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
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
Patch / fix
- Phoenix Contact TC MGUARD RS4000 4G VZW VPN (1010461) 8.8.3
- Phoenix Contact TC MGUARD RS4000 4G ATT VPN (1010463) 8.8.3
- Phoenix Contact FL MGUARD RS4004 TX/DTX (2701876) 8.8.3
- Phoenix Contact FL MGUARD RS4004 TX/DTX VPN (2701877) 8.8.3
- Phoenix Contact TC MGUARD RS4000 3G VPN (2903440) 8.8.3
- Phoenix Contact TC MGUARD RS4000 4G VPN (2903586) 8.8.3
- Innominate Innominate mGuard rs4000 4TX/TX 8.8.3
- Innominate Innominate mGuard rs4000 4TX/TX VPN 8.8.3
- Innominate Innominate mGuard rs4000 4TX/3G/TX VPN 8.8.3
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:N/A:P |
Affected products
- Phoenix Contact TC MGUARD RS4000 4G VZW VPN (1010461)
- Phoenix Contact TC MGUARD RS4000 4G ATT VPN (1010463)
- Phoenix Contact FL MGUARD RS4004 TX/DTX (2701876)
- Phoenix Contact FL MGUARD RS4004 TX/DTX VPN (2701877)
- Phoenix Contact TC MGUARD RS4000 3G VPN (2903440)
- Phoenix Contact TC MGUARD RS4000 4G VPN (2903586)
- Innominate Innominate mGuard rs4000 4TX/TX
- Innominate Innominate mGuard rs4000 4TX/TX VPN
- Innominate Innominate mGuard rs4000 4TX/3G/TX VPN
Classification
- Weakness
-
- CWE-909 Missing Initialization of Resource
References
-
cert.vde.com
/en-us/advisories/vde-2020-046
third-party-advisory
Sources
- CVE List CVE-2020-12523
- NVD CVE-2020-12523
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