Out-of-bounds write in WAGO PFC200
Priority MEDIUM 49CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An exploitable heap buffer overflow vulnerability exists in the iocheckd service ''I/O-Chec'' functionality of WAGO PFC 200 Firmware version 03.01.07(13) and 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a heap buffer overflow, potentially resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.
Why it matters now
EPSS 0.04521 91st percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
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-2019-5081
- 2026-10-03 Alias added: GHSA-v636-46xh-j279
References
More WAGO Pfc 100 Firmware vulnerabilities
- 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
- TI-2019-03539 Missing authentication in WAGO PFC200 CVSS 3.1CRITICAL 9.1
Sources
- CVE-2019-5081 · CVE Program
- CVE-2019-5081 · NVD
- FIRST EPSS
- GHSA-v636-46xh-j279 · GitHub Advisory Database · CC BY 4.0
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