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Medium 6.8Published Feb 5, 2026
CVE-2026-1301Out-of-bounds Write in o6 Automation GmbH Open62541
Updated under an hour ago ()
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It affects o6 Automation GmbH Open62541. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.8 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- icscert
- NVD analysis
- Deferred
- Record last updated
- Feb 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
o6 Automation GmbH Open62541 o6_automation:open62541 (from the name) | from 1.5-rc1 before 1.5-rc2 | CNA record |
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-036-03government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.