Phoenix Contact: FL MGUARD lack of memory release in remote logging functionality
Priority LOW 35CWE-401Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-401.
Summary
In Phoenix Contact FL MGUARD 1102 and 1105 in Versions 1.4.0, 1.4.1 and 1.5.0 the remote logging functionality is impaired by the lack of memory release for data structures from syslog-ng when remote logging is active
Why it matters now
EPSS 0.00933 60th 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 | FL MGUARD | 1.4.0 and later; 1.4.0 and later | — | No fix listed | CNA |
- FL MGUARD VendorPhoenix Contact Affected 1.4.0 and later; 1.4.0 and later Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:phoenixcontact:fl_mguard_1102_firmware:1.4.0:*:*:*:*:*:*:* | 1.4.0 | Vulnerable | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_1102_firmware:1.4.1:*:*:*:*:*:*:* | 1.4.1 | Vulnerable | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_1102_firmware:1.5.0:*:*:*:*:*:*:* | 1.5.0 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:fl_mguard_1102:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_1105_firmware:1.4.0:*:*:*:*:*:*:* | 1.4.0 | Vulnerable | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_1105_firmware:1.4.1:*:*:*:*:*:*:* | 1.4.1 | Vulnerable | Phoenixcontact |
| cpe:2.3:o:phoenixcontact:fl_mguard_1105_firmware:1.5.0:*:*:*:*:*:*:* | 1.5.0 | Vulnerable | Phoenixcontact |
| cpe:2.3:h:phoenixcontact:fl_mguard_1105:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Phoenixcontact |
- cpe:2.3:o:phoenixcontact:fl_mguard_1102_firmware:1.4.0:*:*:*:*:*:*:* Versions 1.4.0 Vulnerable ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_1102_firmware:1.4.1:*:*:*:*:*:*:* Versions 1.4.1 Vulnerable ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_1102_firmware:1.5.0:*:*:*:*:*:*:* Versions 1.5.0 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:fl_mguard_1102:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_1105_firmware:1.4.0:*:*:*:*:*:*:* Versions 1.4.0 Vulnerable ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_1105_firmware:1.4.1:*:*:*:*:*:*:* Versions 1.4.1 Vulnerable ·Phoenixcontact
- cpe:2.3:o:phoenixcontact:fl_mguard_1105_firmware:1.5.0:*:*:*:*:*:*:* Versions 1.5.0 Vulnerable ·Phoenixcontact
- cpe:2.3:h:phoenixcontact:fl_mguard_1105:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Phoenixcontact
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
PHOENIX CONTACT FL MGUARD FL MGUARD 1102 (No. 1153079)*, FL MGUARD 1105 (No. 1153078)*
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-13600 Phoenix Contact: FL MGUARD XSS through web-based management and REST APIPriority LOW 22
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34598
- 2026-10-03 Alias added: GHSA-2mrx-q835-w93g
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-2021-34598 · CVE Program
- CVE-2021-34598 · NVD
- FIRST EPSS
- GHSA-2mrx-q835-w93g · GitHub Advisory Database · CC BY 4.0
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