An issue was discovered on Phoenix Contact mGuard devices that have been updated to…
Priority MEDIUM 47CWE-99Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered on Phoenix Contact mGuard devices that have been updated to Version 8.4.0. When updating an mGuard device to Version 8.4.0 via the update-upload facility, the update will succeed, but it will reset the password of the admin user to its default value.
Why it matters now
EPSS 0.02428 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 mGuard 8.4.0 | Phoenix Contact mGuard 8.4.0 | — | No fix listed | CNA |
- Phoenix Contact mGuard 8.4.0 Vendor— Affected Phoenix Contact mGuard 8.4.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:phoenixcontact:mguard_firmware:8.4.0:*:*:*:*:*:*:* | 8.4.0 | Vulnerable | Phoenixcontact |
- cpe:2.3:o:phoenixcontact:mguard_firmware:8.4.0:*:*:*:*:*:*:* Versions 8.4.0 Vulnerable ·Phoenixcontact
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-5159
- 2026-10-03 Alias added: GHSA-xh78-5j99-gwm4
References
Sources
- CVE-2017-5159 · CVE Program
- CVE-2017-5159 · NVD
- FIRST EPSS
- GHSA-xh78-5j99-gwm4 · GitHub Advisory Database · CC BY 4.0
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