CVE-2026-1301
Out-of-bounds Write in o6 Automation GmbH Open62541
- State
- Published
- Severity
- 6.8 Medium
- Published
- Feb 5, 2026
- Updated
- Feb 5, 2026
- Reserved
- Jan 21, 2026
Description
In builds with PubSub and JSON enabled, a crafted JSON message can cause the decoder to write beyond a heap-allocated array before authentication, reliably crashing the process and corrupting memory.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | icscert |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
Open62541o6 Automation GmbH |
|
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-036-03government-resource
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