Buffer overflow in Openplcproject Openplc_v3
CVE-2026-11826
OpenPLC_v3 contains a heap-based buffer overflow in the getData() function in webserver/core/modbus_master.cpp. getData() reads characters between two delimiters into a caller-supplied buffer with no size parameter and no bounds check. In…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Openplcproject Openplc_v3 — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-11826?
- CVE-2026-11826 is a high-severity vulnerability in Openplcproject Openplc_v3, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-07-18.
- How severe is CVE-2026-11826?
- High severity. CVSS v3 base score is 8.8 out of 10.