NULL Pointer Dereference in MZ Automation libIEC61850
Priority MEDIUM 44CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-476.
Summary
A NULL pointer dereference in the MMS Write Named Variable List handler, which may allow a network adjacent attacker to crash the server by sending a WriteRequest with an empty listOfData field.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0046 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MZ Automation | libIEC61850 | 1.0.0 – 1.6.1 | — | No fix listed | CNA |
- libIEC61850 VendorMZ Automation Affected 1.0.0 – 1.6.1 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mz-automation:libiec61850:*:*:*:*:*:*:*:* | — | — | MZ Automation |
- cpe:2.3:a:mz-automation:libiec61850:*:*:*:*:*:*:*:* Versions — — ·MZ Automation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50032
- 2026-10-03 Alias added: GHSA-37jp-3q9w-phcm
References
More MZ Automation vulnerabilities
- TI-2026-75355 Infinite loop and out-of-bounds read in libIEC61850 ACSE parsing CVSS 4.0HIGH 8.7
- TI-2026-75345 Remote NULL dereference in libIEC61850 MMS Read crashes servers CVSS 3.1HIGH 7.5
- TI-2026-75344 Remote information disclosure in libIEC61850 MMS file service CVSS 3.1HIGH 7.5
- TI-2024-18824 In mz-automation libiec61850 v1.4.0, a NULL Pointer Dereference was detected in the… CVSS 3.1HIGH 7.5
- TI-2022-05561 Infinite loop in MZ Automation libiec61850 CVSS 3.1HIGH 7.5
- TI-2026-45011 MZ Automation lib60870 Out-of-bounds Read CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-50032 · CVE Program
- CVE-2026-50032 · NVD
- FIRST EPSS
- GHSA-37jp-3q9w-phcm · GitHub Advisory Database · CC BY 4.0
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