Missing authentication in WAGO PFC200
Priority MEDIUM 43CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.
Summary
An exploitable denial-of-service vulnerability exists in the iocheckd service ‘’I/O-Chec’’ functionality of WAGO PFC 200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC 100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a denial of service, resulting in the device entering an error state where it ceases all network communications. An attacker can send unauthenticated packets to trigger this vulnerability.
Why it matters now
EPSS 0.01643 76th 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 |
|---|---|---|---|---|---|
| — | WAGO PFC200 | Firmware version 03.01.07(13); Firmware version 03.00.39(12) | — | No fix listed | CNA |
| — | WAGO PFC100 | Firmware version 03.00.39(12) | — | No fix listed | CNA |
- WAGO PFC200 Vendor— Affected Firmware version 03.01.07(13); Firmware version 03.00.39(12) Fixed in — No fix listed CNA
- WAGO PFC100 Vendor— Affected Firmware version 03.00.39(12) Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:wago:pfc_200_firmware:03.00.39\(12\):*:*:*:*:*:*:* | 03.00.39(12) | Vulnerable | WAGO |
| cpe:2.3:o:wago:pfc_200_firmware:03.01.07\(13\):*:*:*:*:*:*:* | 03.01.07(13) | Vulnerable | WAGO |
| cpe:2.3:h:wago:pfc_200:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
| cpe:2.3:o:wago:pfc_100_firmware:03.00.39\(12\):*:*:*:*:*:*:* | 03.00.39(12) | Vulnerable | WAGO |
| cpe:2.3:h:wago:pfc_100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
- cpe:2.3:o:wago:pfc_200_firmware:03.00.39\(12\):*:*:*:*:*:*:* Versions 03.00.39(12) Vulnerable ·WAGO
- cpe:2.3:o:wago:pfc_200_firmware:03.01.07\(13\):*:*:*:*:*:*:* Versions 03.01.07(13) Vulnerable ·WAGO
- cpe:2.3:h:wago:pfc_200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
- cpe:2.3:o:wago:pfc_100_firmware:03.00.39\(12\):*:*:*:*:*:*:* Versions 03.00.39(12) Vulnerable ·WAGO
- cpe:2.3:h:wago:pfc_100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-5077
- 2026-10-03 Alias added: GHSA-wg4r-4x32-rpwp
References
More WAGO Pfc 100 Firmware vulnerabilities
- TI-2019-03542 Out-of-bounds write in WAGO PFC200 CVSS 3.1CRITICAL 9.8
- TI-2019-03536 Out-of-bounds write in WAGO PFC200 CVSS 3.1CRITICAL 9.8
- TI-2020-10015 OS command injection in WAGO Series PFC 100 CVSS 3.1CRITICAL 10.0
- TI-2019-03540 Out-of-bounds write in WAGO PFC200 CVSS 3.1CRITICAL 9.8
- TI-2019-03535 Out-of-bounds write in WAGO PFC200 CVSS 3.1CRITICAL 9.8
- TI-2019-03541 Missing authentication in WAGO PFC200 CVSS 3.1CRITICAL 9.1
Sources
- CVE-2019-5077 · CVE Program
- CVE-2019-5077 · NVD
- FIRST EPSS
- GHSA-wg4r-4x32-rpwp · GitHub Advisory Database · CC BY 4.0
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