CVE-2026-50103
Improper Handling of Syntactically Invalid Structure in MZ Automation libIEC61850
- State
- Published
- Severity
- 7.1 High
- Published
- Jul 23, 2026
- Updated
- Jul 24, 2026
- Reserved
- Jun 9, 2026
Description
A NULL pointer dereference in the L2 GOOSE and R-GOOSE shared parser, which may allow a network-adjacent attacker to crash a subscribing application by sending a crafted GOOSE frame containing a malformed TLV value.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | icscert |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | icscert |
Weaknesses
- CWE-228 Improper Handling of Syntactically Invalid Structure
Affected Products
| Product | Versions |
|---|---|
libIEC61850MZ Automation |
|
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-06government-resource
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